From 14e19309437bc52950a6a15532bf89e7a8dccfa0 Mon Sep 17 00:00:00 2001
From: Theo Paris <theo@theoparis.com>
Date: Tue, 1 Sep 2026 01:10:11 -0700
Subject: [PATCH] feat(eval): add fetch builtins

Signed-off-by: Theo Paris <theo@theoparis.com>
---
 Cargo.lock                                | 2599 ++++++++++++++++++++-
 Cargo.toml                                |   10 +
 rix-cli/src/main.rs                       |   31 +-
 rix-eval/Cargo.toml                       |    4 +
 rix-eval/src/builtins.rs                  |  496 ++++
 rix-eval/src/eval/evaluator.rs            |    4 +
 rix-eval/src/eval/expressions/literals.rs |   13 +-
 7 files changed, 3084 insertions(+), 73 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 1625f72..6a7fa3b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -20,6 +20,12 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "allocator-api2"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
+
 [[package]]
 name = "anes"
 version = "0.1.6"
@@ -62,7 +68,7 @@ version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -73,21 +79,65 @@ checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
 dependencies = [
  "anstyle",
  "once_cell_polyfill",
- "windows-sys",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "arc-swap"
+version = "1.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c049c0be4daef0b145cb3555416b3b8ef5b7888a38aea1a3a155801fe7b0810b"
+dependencies = [
+ "rustversion",
 ]
 
+[[package]]
+name = "atomic-waker"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
+
 [[package]]
 name = "autocfg"
 version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2032f911046de80f0a198e0901378627c33f59ea0ac00e363d481118bd70a53"
 
+[[package]]
+name = "aws-lc-rs"
+version = "1.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce2b2dcc879c3bae0d371e77c99f2238400ef24ec001394befa67b6e543add9e"
+dependencies = [
+ "aws-lc-sys",
+ "zeroize",
+]
+
+[[package]]
+name = "aws-lc-sys"
+version = "0.44.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f09fae7be8bb3174e05c6afdb34199e6dc0c7c04ba9fa237b1967adfbde27483"
+dependencies = [
+ "cc",
+ "cmake",
+ "dunce",
+ "fs_extra",
+ "pkg-config",
+]
+
 [[package]]
 name = "base32"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "022dfe9eb35f19ebbcb51e0b40a5ab759f46ad60cadf7297e0bd085afb50e076"
 
+[[package]]
+name = "base64"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
+
 [[package]]
 name = "bit-set"
 version = "0.8.0"
@@ -103,12 +153,27 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5e764a1d40d510daf35e07be9eb06e75770908c27d411ee6c92109c9840eaaf7"
 
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
 [[package]]
 name = "bitflags"
 version = "2.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b588b76d00fde79687d7646a9b5bdf3cc0f655e0bbd080335a95d7e96f3587da"
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "block-buffer"
 version = "0.12.1"
@@ -118,12 +183,35 @@ dependencies = [
  "hybrid-array",
 ]
 
+[[package]]
+name = "bstr"
+version = "1.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6bb31b46c14244e20ee9984b11bf5c992b91fb6939fea616e3512c8baecdbe5f"
+dependencies = [
+ "memchr",
+ "regex-automata",
+ "serde_core",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72f5acc6cb2ba439de613abc23857ec3d78374d8ed5ac84e9d11336e87da8649"
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
+[[package]]
+name = "bytes"
+version = "1.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc652a48c352aef3ea3aed32080501cf3ef6ed5da78602a020c991775b0aff04"
+
 [[package]]
 name = "cast"
 version = "0.3.0"
@@ -137,6 +225,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ad534f4357a5264cce5019c989cf66a4f0dc4e0d1b1d15f8aacec0ff7360273"
 dependencies = [
  "find-msvc-tools",
+ "jobserver",
+ "libc",
  "shlex",
 ]
 
@@ -146,6 +236,23 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
+[[package]]
+name = "cfg_aliases"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f079e83a288787bcd14a6aea84cee5c87a67c5a3e660c30f557a3d24761b3527"
+
+[[package]]
+name = "chacha20"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65c35e4b699c7e15ccbe7ee35c005e4fc0a278d22238a2857e6ce2dadeda1b06"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.3.1",
+ "rand_core 0.10.1",
+]
+
 [[package]]
 name = "ciborium"
 version = "0.2.2"
@@ -213,6 +320,24 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9"
 
+[[package]]
+name = "clru"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "197fd99cb113a8d5d9b6376f3aa817f32c1078f2343b714fff7d2ca44fdf67d5"
+dependencies = [
+ "hashbrown 0.16.1",
+]
+
+[[package]]
+name = "cmake"
+version = "0.1.58"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0f78a02292a74a88ac736019ab962ece0bc380e3f977bf72e376c5d78ff0678"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "codespan"
 version = "0.13.1"
@@ -240,12 +365,38 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d07550c9036bf2ae0c684c4297d503f838287c83c53686d05370d0e139ae570"
 
+[[package]]
+name = "combine"
+version = "4.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfc320937d09e6de266b31b9afb480f197d7a861be86be7cb2ea7e5d1bfffc5e"
+dependencies = [
+ "bytes",
+ "memchr",
+]
+
 [[package]]
 name = "const-oid"
 version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6ef517f0926dd24a1582492c791b6a4818a4d94e789a334894aa15b0d12f55c"
 
+[[package]]
+name = "core-foundation"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2a6cd9ae233e7f62ba4e9353e81a88df7fc8a5987b8d445b4d90c879bd156f6"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
+
 [[package]]
 name = "countme"
 version = "3.0.1"
@@ -254,13 +405,31 @@ checksum = "7704b5fdd17b18ae31c4c1da5a2e0305a2bf17b5249300a9ee9ed7b72114c636"
 
 [[package]]
 name = "cpufeatures"
-version = "0.3.0"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "cpufeatures"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201"
+checksum = "5ca28b0ae3115b884660db4118d803791fd6756b6e88f39c0f3f7859060d7566"
 dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8498c871161e1742aaa9d52551b2d6ebdd4c3d45a3be423e3728f33b955be550"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "criterion"
 version = "0.8.2"
@@ -296,6 +465,15 @@ dependencies = [
  "itertools",
 ]
 
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d85363c37faeca707aef026efa9f3b34d077bce547e48f770770625c6013679e"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crossbeam-deque"
 version = "0.8.7"
@@ -327,6 +505,16 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
 
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "crypto-common"
 version = "0.2.2"
@@ -336,15 +524,81 @@ dependencies = [
  "hybrid-array",
 ]
 
+[[package]]
+name = "dashmap"
+version = "6.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6361d5c062261c78a176addb82d4c821ae42bed6089de0e12603cd25de2059c"
+dependencies = [
+ "cfg-if",
+ "crossbeam-utils",
+ "hashbrown 0.14.5",
+ "lock_api",
+ "once_cell",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "defmt"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2953bfe4f93bbd20cc71198842756f77d161884c99ebbabc41d80231ded88d1"
+dependencies = [
+ "bitflags 1.3.2",
+ "defmt-macros",
+]
+
+[[package]]
+name = "defmt-macros"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bad9c72e7ca2137e0dc3813245a0d282fd6daad32fd800af018306a9169b5fe8"
+dependencies = [
+ "defmt-parser",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "defmt-parser"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10d60334b3b2e7c9d91ef8150abfb6fa4c1c39ebbcf4a81c2e346aad939fee3e"
+dependencies = [
+ "thiserror",
+]
+
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer 0.10.4",
+ "crypto-common 0.1.7",
+]
+
 [[package]]
 name = "digest"
 version = "0.11.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1dd6dbb5841937940781866fa1281a1ff7bd3bf827091440879f9994983d5c2"
 dependencies = [
- "block-buffer",
+ "block-buffer 0.12.1",
  "const-oid",
- "crypto-common",
+ "crypto-common 0.2.2",
+]
+
+[[package]]
+name = "displaydoc"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c6232dd377dcc64799954cbd3a9bb882e9cdc1308ccd87b1c098f1fb2eaf82a8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 3.0.4",
 ]
 
 [[package]]
@@ -353,12 +607,27 @@ version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aeda16ab4059c5fd2a83f2b9c9e9c981327b18aa8e3b313f7e6563799d4f093e"
 
+[[package]]
+name = "dunce"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92773504d58c093f6de2459af4af33faa518c13451eb8f2b5698ed3d36e7c813"
+
 [[package]]
 name = "either"
 version = "1.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "252afb9ae5eaa683babdc6a068b3f5726eb19e05070c731f9b2a23a7c3e8ed34"
 
+[[package]]
+name = "encoding_rs"
+version = "0.8.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75030f3c4f45dafd7586dd6780965a8c7e8e285a5ecb86713e63a79c5b2766f3"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.2"
@@ -372,7 +641,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -385,30 +654,102 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "faster-hex"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7223ae2d2f179b803433d9c830478527e92b8117eab39460edae7f1614d9fb73"
+dependencies = [
+ "heapless",
+ "serde",
+]
+
 [[package]]
 name = "fastrand"
 version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "da7c62ceae207dd37ea5b845da6a0696c799f85e97da1ab5b7910be3c1c80223"
 
+[[package]]
+name = "filetime"
+version = "0.2.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c287a33c7f0a620c38e641e7f60827713987b3c0f26e8ddc9462cc69cf75759"
+dependencies = [
+ "cfg-if",
+ "libc",
+]
+
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d45db016d36b838f563236e9193d0ee6ce38f3f68b6c94e914b4929c96bbb890"
 
+[[package]]
+name = "flate2"
+version = "1.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e634e2e0ebac1ee034020da1ca582e17ffe4e0f5e985823721e168928136dcb"
+dependencies = [
+ "zlib-rs",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
+[[package]]
+name = "foldhash"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77ce24cb58228fbb8aa041425bb1050850ac19177686ea6e0f41a70416f56fdb"
+
+[[package]]
+name = "form_urlencoded"
+version = "1.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb4cb245038516f5f85277875cdaa4f7d2c9a0fa0468de06ed190163b1581fcf"
+dependencies = [
+ "percent-encoding",
+]
+
+[[package]]
+name = "fs_extra"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c"
+
+[[package]]
+name = "futures-channel"
+version = "0.3.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1f9e3d69d39e4862ffed03ed071a76f9a13ba1d9109d355b0f0aa6b15e393c4"
+dependencies = [
+ "futures-core",
+ "futures-sink",
+]
+
 [[package]]
 name = "futures-core"
 version = "0.3.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "92d699e522242e69e3003b94ecc1f960f3a5e015aa7c5d7486e65ad01dd94f5e"
 
+[[package]]
+name = "futures-io"
+version = "0.3.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53c0fa8157de1303bfffdaa1cc2a673bfffb60102f76b0ef4441659124373fed"
+
+[[package]]
+name = "futures-sink"
+version = "0.3.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1944426bf7d03f1d14f708785e4b33efd750b36d48a157b836b3efc15ede8e1d"
+
 [[package]]
 name = "futures-task"
 version = "0.3.34"
@@ -422,11 +763,37 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0d50a92467f8ba5dd6e3ee5d4bd04d73ab2e4e1c44474a0674821dfce14b79bc"
 dependencies = [
  "futures-core",
+ "futures-io",
+ "futures-sink",
  "futures-task",
+ "memchr",
  "pin-project-lite",
  "slab",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff2abc00be7fca6ebc474524697ae276ad847ad0a6b3faa4bcb027e9a4614ad0"
+dependencies = [
+ "cfg-if",
+ "js-sys",
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+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "112b39cec0b298b6c1999fee3e31427f74f676e4cb9879ed1a121b43661a4154"
+
 [[package]]
 name = "md5"
 version = "0.8.1"
@@ -560,6 +2167,15 @@ version = "2.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf8baf1c55e62ffcace7a9f06f4bd9cd3f0c4beb022d3b367256b91b87513d98"
 
+[[package]]
+name = "memmap2"
+version = "0.9.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d1219ed1b7f229ee7104d281dd01d6802fe28bb6e95d292942c4daacdeb798c0"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "memoffset"
 version = "0.9.1"
@@ -569,6 +2185,29 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "mime"
+version = "0.3.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
+
+[[package]]
+name = "mio"
+version = "1.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30d65c71f1ce40ab09135ce117d742b9f8a19ff91a41a8b57ed50bc2de59c427"
+dependencies = [
+ "libc",
+ "wasi",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "nonempty"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9737e026353e5cd0736f98eddae28665118eb6f6600902a7f50db585621fecb6"
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -596,6 +2235,12 @@ version = "11.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d6790f58c7ff633d8771f42965289203411a5e5c68388703c06e14f24770b41e"
 
+[[package]]
+name = "openssl-probe"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c87def4c32ab89d880effc9e097653c8da5d6ef28e6b539d313baaacfbafcbe"
+
 [[package]]
 name = "page_size"
 version = "0.6.0"
@@ -606,12 +2251,47 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "parking_lot"
+version = "0.12.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93857453250e3077bd71ff98b6a65ea6621a19bb0f559a85248955ac12c45a1a"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2621685985a2ebf1c516881c026032ac7deafcda1a2c9b7850dc81e3dfcb64c1"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-link",
+]
+
+[[package]]
+name = "percent-encoding"
+version = "2.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"
 
+[[package]]
+name = "pkg-config"
+version = "0.3.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6b464fbc74e149a392436b17d523f769e057cb6877f6a5c4618bc6f11800548"
+
 [[package]]
 name = "plotters"
 version = "0.3.7"
@@ -640,6 +2320,30 @@ dependencies = [
  "plotters-backend",
 ]
 
+[[package]]
+name = "portable-atomic"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05c8b63e8d9609db387f0324918f81d68fe27748f084ef092fb35954d0539a85"
+
+[[package]]
+name = "portable-atomic-util"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2a106d1259c23fac8e543272398ae0e3c0b8d33c88ed73d0cc71b0f1d902618"
+dependencies = [
+ "portable-atomic",
+]
+
+[[package]]
+name = "potential_utf"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d83eb9bc6d8e5cf568e7a1101d60ee05e81ed50ea106026f3d18deeb046d7661"
+dependencies = [
+ "zerovec",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.21"
@@ -658,6 +2362,15 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "prodash"
+version = "31.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "962200e2d7d551451297d9fdce85138374019ada198e30ea9ede38034e27604c"
+dependencies = [
+ "parking_lot",
+]
+
 [[package]]
 name = "proptest"
 version = "1.11.0"
@@ -666,9 +2379,9 @@ checksum = "4b45fcc2344c680f5025fe57779faef368840d0bd1f42f216291f0dc4ace4744"
 dependencies = [
  "bit-set",
  "bit-vec",
- "bitflags",
+ "bitflags 2.13.1",
  "num-traits",
- "rand",
+ "rand 0.9.5",
  "rand_chacha",
  "rand_xorshift",
  "regex-syntax",
@@ -692,6 +2405,63 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "quinn"
+version = "0.11.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c1a41e437b6bbd489372cd4971de128e85c855f56c57f283d20ff016cf7c0a8"
+dependencies = [
+ "bytes",
+ "cfg_aliases",
+ "pin-project-lite",
+ "quinn-proto",
+ "quinn-udp",
+ "rustc-hash 2.1.3",
+ "rustls",
+ "socket2",
+ "thiserror",
+ "tokio",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "quinn-proto"
+version = "0.11.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04759210543be93709136e28212294a659ef5001836ff4eab4d663e4529bba83"
+dependencies = [
+ "aws-lc-rs",
+ "bytes",
+ "getrandom 0.4.3",
+ "lru-slab",
+ "rand 0.10.2",
+ "rand_pcg",
+ "ring",
+ "rustc-hash 2.1.3",
+ "rustls",
+ "rustls-pki-types",
+ "slab",
+ "thiserror",
+ "tinyvec",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "quinn-udp"
+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35a133f956daabe89a61a685c2649f13d82d5aa4bd5d12d1277e1072a21c0694"
+dependencies = [
+ "cfg_aliases",
+ "libc",
+ "once_cell",
+ "socket2",
+ "tracing",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.47"
@@ -720,7 +2490,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9ef1d0d795eb7d84685bca4f72f3649f064e6641543d3a8c415898726a57b41"
 dependencies = [
  "rand_chacha",
- "rand_core",
+ "rand_core 0.9.5",
+]
+
+[[package]]
+name = "rand"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7f5fa3a058cd35567ef9bfa5e75732bee0f9e4c55fa90477bef2dfcdbc4be80"
+dependencies = [
+ "chacha20",
+ "getrandom 0.4.3",
+ "rand_core 0.10.1",
 ]
 
 [[package]]
@@ -730,7 +2511,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.9.5",
 ]
 
 [[package]]
@@ -742,13 +2523,28 @@ dependencies = [
  "getrandom 0.3.4",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
+
+[[package]]
+name = "rand_pcg"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caa0f4137e1c0a72f4c651489402276c8e8e1cf081f3b0ba156d2cbeef09e86a"
+dependencies = [
+ "rand_core 0.10.1",
+]
+
 [[package]]
 name = "rand_xorshift"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "513962919efc330f829edb2535844d1b912b0fbe2ca165d613e4e8788bb05a5a"
 dependencies = [
- "rand_core",
+ "rand_core 0.9.5",
 ]
 
 [[package]]
@@ -771,6 +2567,15 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.5.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d"
+dependencies = [
+ "bitflags 2.13.1",
+]
+
 [[package]]
 name = "regex"
 version = "1.13.1"
@@ -800,6 +2605,60 @@ version = "0.8.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d6f6ff9a378485b298a5286656da665ba74413d36db0979633275d2e708145d4"
 
+[[package]]
+name = "reqwest"
+version = "0.13.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "219c5811de6525e5416c7d5d53bb656d3afdbc6c5af816e0802bcfa42dbdc1c3"
+dependencies = [
+ "base64",
+ "bytes",
+ "encoding_rs",
+ "futures-channel",
+ "futures-core",
+ "futures-util",
+ "h2",
+ "http",
+ "http-body",
+ "http-body-util",
+ "hyper",
+ "hyper-rustls",
+ "hyper-util",
+ "js-sys",
+ "log",
+ "mime",
+ "percent-encoding",
+ "pin-project-lite",
+ "quinn",
+ "rustls",
+ "rustls-pki-types",
+ "rustls-platform-verifier",
+ "sync_wrapper",
+ "tokio",
+ "tokio-rustls",
+ "tower",
+ "tower-http",
+ "tower-service",
+ "url",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+]
+
+[[package]]
+name = "ring"
+version = "0.17.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4689e6c2294d81e88dc6261c768b63bc4fcdb852be6d1352498b114f61383b7"
+dependencies = [
+ "cc",
+ "cfg-if",
+ "getrandom 0.2.17",
+ "libc",
+ "untrusted",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "rix-cli"
 version = "0.1.0"
@@ -821,17 +2680,21 @@ dependencies = [
  "codespan",
  "codespan-reporting",
  "criterion",
+ "flate2",
+ "gix",
  "hex",
  "md5",
  "proptest",
  "quick-xml",
  "regex",
+ "reqwest",
  "rix-parser",
  "rowan",
  "serde",
  "serde_json",
- "sha1",
+ "sha1 0.11.0",
  "sha2",
+ "tar",
  "thiserror",
  "toml",
 ]
@@ -892,17 +2755,101 @@ version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6b1e7f9a428571be2dc5bc0505c13fb6bf936822b894ec87abf8a08a4e51742d"
 
+[[package]]
+name = "rustc_version"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfcb3a22ef46e85b45de6ee7e79d063319ebb6594faafcf1c225ea92ab6e9b92"
+dependencies = [
+ "semver",
+]
+
 [[package]]
 name = "rustix"
 version = "1.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "rustls"
+version = "0.23.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0283386ce02abc0151e1761d08802dfe86c173b0b494af5cbc086574e453da06"
+dependencies = [
+ "aws-lc-rs",
+ "once_cell",
+ "rustls-pki-types",
+ "rustls-webpki",
+ "subtle",
+ "zeroize",
+]
+
+[[package]]
+name = "rustls-native-certs"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dab5152771c58876a2146916e53e35057e1a4dfa2b9df0f0305b07f611fdea4d"
+dependencies = [
+ "openssl-probe",
+ "rustls-pki-types",
+ "schannel",
+ "security-framework",
+]
+
+[[package]]
+name = "rustls-pki-types"
+version = "1.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f4925028c7eb5d1fcdaf196971378ed9d2c1c4efc7dc5d011256f76c99c0a96"
+dependencies = [
+ "web-time",
+ "zeroize",
+]
+
+[[package]]
+name = "rustls-platform-verifier"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26d1e2536ce4f35f4846aa13bff16bd0ff40157cdb14cc056c7b14ba41233ba0"
+dependencies = [
+ "core-foundation",
+ "core-foundation-sys",
+ "jni",
+ "log",
+ "once_cell",
+ "rustls",
+ "rustls-native-certs",
+ "rustls-platform-verifier-android",
+ "rustls-webpki",
+ "security-framework",
+ "security-framework-sys",
+ "webpki-root-certs",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "rustls-platform-verifier-android"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f87165f0995f63a9fbeea62b64d10b4d9d8e78ec6d7d51fb2125fda7bb36788f"
+
+[[package]]
+name = "rustls-webpki"
+version = "0.103.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3c3cf1d8b1e7d4927e2d154c3fcb02979afb9939629c62cd9048d4f07b60ac2"
+dependencies = [
+ "aws-lc-rs",
+ "ring",
+ "rustls-pki-types",
+ "untrusted",
 ]
 
 [[package]]
@@ -932,6 +2879,50 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "schannel"
+version = "0.1.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91c1b7e4904c873ef0710c1f407dde2e6287de2bebc1bbbf7d430bb7cbffd939"
+dependencies = [
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+
+[[package]]
+name = "security-framework"
+version = "3.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7f4bc775c73d9a02cde8bf7b2ec4c9d12743edf609006c7facc23998404cd1d"
+dependencies = [
+ "bitflags 2.13.1",
+ "core-foundation",
+ "core-foundation-sys",
+ "libc",
+ "security-framework-sys",
+]
+
+[[package]]
+name = "security-framework-sys"
+version = "2.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ce2691df843ecc5d231c0b14ece2acc3efb62c0a398c7e1d875f3983ce020e3"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
+[[package]]
+name = "semver"
+version = "1.0.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a7852d02fc848982e0c167ef163aaff9cd91dc640ba85e263cb1ce46fae51cd"
+
 [[package]]
 name = "serde"
 version = "1.0.229"
@@ -984,6 +2975,17 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "sha1"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a978451301f4db1d02937a4ab3ccce137717b81826e79b7d49ffe3244a13c3b8"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.2.17",
+ "digest 0.10.7",
+]
+
 [[package]]
 name = "sha1"
 version = "0.11.0"
@@ -991,8 +2993,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aacc4cc499359472b4abe1bf11d0b12e688af9a805fa5e3016f9a386dc2d0214"
 dependencies = [
  "cfg-if",
- "cpufeatures",
- "digest",
+ "cpufeatures 0.3.1",
+ "digest 0.11.3",
+]
+
+[[package]]
+name = "sha1-checked"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89f599ac0c323ebb1c6082821a54962b839832b03984598375bff3975b804423"
+dependencies = [
+ "digest 0.10.7",
+ "sha1 0.10.7",
 ]
 
 [[package]]
@@ -1002,21 +3014,59 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "446ba717509524cb3f22f17ecc096f10f4822d76ab5c0b9822c5f9c284e825f4"
 dependencies = [
  "cfg-if",
- "cpufeatures",
- "digest",
+ "cpufeatures 0.3.1",
+ "digest 0.11.3",
+]
+
+[[package]]
+name = "shlex"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8fadd59c855ef2080decdef8ff161eb6661b86933c9d82e5ba29dc602a55aba"
+
+[[package]]
+name = "simd_cesu8"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11031e251abf8611c80f460e19dbdeb54a66db918e49c65a7065b46ac7aec520"
+dependencies = [
+ "rustc_version",
+ "simdutf8",
 ]
 
 [[package]]
-name = "shlex"
-version = "2.0.1"
+name = "simdutf8"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3a9fe34e3e7a50316060351f37187a3f546bce95496156754b601a5fa71b76e"
+
+[[package]]
+name = "slab"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5"
+
+[[package]]
+name = "smallvec"
+version = "1.15.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ed6a63f02c8539c91a8685a86f4099661ba3da017932f6ebbea6de3f0fa7c90"
+
+[[package]]
+name = "socket2"
+version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8fadd59c855ef2080decdef8ff161eb6661b86933c9d82e5ba29dc602a55aba"
+checksum = "c3d1e2c7f27f8d4cb10542a02c49005dbd6e93095799d6f3be745fae9f8fedd4"
+dependencies = [
+ "libc",
+ "windows-sys 0.61.2",
+]
 
 [[package]]
-name = "slab"
-version = "0.4.12"
+name = "stable_deref_trait"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5"
+checksum = "6ce2be8dc25455e1f91df71bfa12ad37d7af1092ae736f3a6cd0e37bc7810596"
 
 [[package]]
 name = "strsim"
@@ -1024,6 +3074,12 @@ version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
+[[package]]
+name = "subtle"
+version = "2.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
+
 [[package]]
 name = "syn"
 version = "2.0.119"
@@ -1046,6 +3102,37 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "sync_wrapper"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bf256ce5efdfa370213c1dabab5935a12e49f2c58d15e9eac2870d3b4f27263"
+dependencies = [
+ "futures-core",
+]
+
+[[package]]
+name = "synstructure"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "728a70f3dbaf5bab7f0c4b1ac8d7ae5ea60a4b5549c8a5914361c99147a709d2"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "tar"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f6221d9a6003c78398e3b239969f352578258df48c8eb051caadae0015bc840"
+dependencies = [
+ "filetime",
+ "libc",
+ "xattr",
+]
+
 [[package]]
 name = "tempfile"
 version = "3.27.0"
@@ -1056,7 +3143,7 @@ dependencies = [
  "getrandom 0.4.3",
  "once_cell",
  "rustix",
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1094,6 +3181,16 @@ dependencies = [
  "syn 3.0.4",
 ]
 
+[[package]]
+name = "tinystr"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1e27c91459209c2986af3dcf603a5a74a4368754ce37414f59acc971167f643"
+dependencies = [
+ "displaydoc",
+ "zerovec",
+]
+
 [[package]]
 name = "tinytemplate"
 version = "1.2.1"
@@ -1104,6 +3201,59 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "tinyvec"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb4ebadaa0af04fab11ae01eb5f9fdb5f9c5b875506e210e71c07873528baa7f"
+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
+
+[[package]]
+name = "tokio"
+version = "1.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "202caea871b69668250d242070849eb495be178ed697a3e98aebce5bc81a0bed"
+dependencies = [
+ "bytes",
+ "libc",
+ "mio",
+ "pin-project-lite",
+ "socket2",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "tokio-rustls"
+version = "0.26.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1729aa945f29d91ba541258c8df89027d5792d85a8841fb65e8bf0f4ede4ef61"
+dependencies = [
+ "rustls",
+ "tokio",
+]
+
+[[package]]
+name = "tokio-util"
+version = "0.7.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "494815d09bf52b5548659851081238f0ca39ff638363907596da739561c62c52"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "libc",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "toml"
 version = "1.1.4+spec-1.1.0"
@@ -1143,12 +3293,82 @@ version = "1.1.2+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d56353a2a665ad0f41a421187180aab746c8c325620617ad883a99a1cbe66d2"
 
+[[package]]
+name = "tower"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebe5ef63511595f1344e2d5cfa636d973292adc0eec1f0ad45fae9f0851ab1d4"
+dependencies = [
+ "futures-core",
+ "futures-util",
+ "pin-project-lite",
+ "sync_wrapper",
+ "tokio",
+ "tower-layer",
+ "tower-service",
+]
+
+[[package]]
+name = "tower-http"
+version = "0.6.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4cfcf7e2740e6fc6d4d688b4ef00650406bb94adf4731e43c096c3a19fe40840"
+dependencies = [
+ "bitflags 2.13.1",
+ "bytes",
+ "futures-util",
+ "http",
+ "http-body",
+ "pin-project-lite",
+ "tower",
+ "tower-layer",
+ "tower-service",
+ "url",
+]
+
+[[package]]
+name = "tower-layer"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "121c2a6cda46980bb0fcd1647ffaf6cd3fc79a013de288782836f6df9c48780e"
+
+[[package]]
+name = "tower-service"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8df9b6e13f2d32c91b9bd719c00d1958837bc7dec474d94952798cc8e69eeec3"
+
+[[package]]
+name = "tracing"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100"
+dependencies = [
+ "pin-project-lite",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a"
+dependencies = [
+ "once_cell",
+]
+
 [[package]]
 name = "triomphe"
 version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b40688ea6389c8171614b25491f71d4a27946e0c7ce2da1c6de27e25abf1a0ae"
 
+[[package]]
+name = "try-lock"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
+
 [[package]]
 name = "typenum"
 version = "1.20.1"
@@ -1161,24 +3381,69 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eaea85b334db583fe3274d12b4cd1880032beab409c0d774be044d4480ab9a94"
 
+[[package]]
+name = "unicode-bom"
+version = "2.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7eec5d1121208364f6793f7d2e222bf75a915c19557537745b195b253dd64217"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
 
+[[package]]
+name = "unicode-normalization"
+version = "0.1.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fd4f6878c9cb28d874b009da9e8d183b5abc80117c40bbd187a1fde336be6e8"
+dependencies = [
+ "tinyvec",
+]
+
 [[package]]
 name = "unicode-width"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4ac048d71ede7ee76d585517add45da530660ef4390e49b098733c6e897f254"
 
+[[package]]
+name = "untrusted"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
+
+[[package]]
+name = "url"
+version = "2.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff67a8a4397373c3ef660812acab3268222035010ab8680ec4215f38ba3d0eed"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "percent-encoding",
+ "serde",
+]
+
+[[package]]
+name = "utf8_iter"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
+
 [[package]]
 name = "utf8parse"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
 [[package]]
 name = "wait-timeout"
 version = "0.2.1"
@@ -1198,6 +3463,21 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "want"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa7760aed19e106de2c7c0b581b509f2f25d3dacaf737cb82ac61bc6d760b0e"
+dependencies = [
+ "try-lock",
+]
+
+[[package]]
+name = "wasi"
+version = "0.11.1+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
+
 [[package]]
 name = "wasip2"
 version = "1.0.4+wasi-0.2.12"
@@ -1220,6 +3500,16 @@ dependencies = [
  "wasm-bindgen-shared",
 ]
 
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.77"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b7777d5cc23d0e91404e53ce2d5e8ec7acae3026b16233dba62cd3246457950"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.127"
@@ -1262,6 +3552,25 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "web-time"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "webpki-root-certs"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b96554aa2acc8ccdb7e1c9a58a7a68dd5d13bccc69cd124cb09406db612a1c9b"
+dependencies = [
+ "rustls-pki-types",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -1284,7 +3593,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1299,6 +3608,15 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
 
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.61.2"
@@ -1308,6 +3626,70 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "windows-targets"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
 [[package]]
 name = "winnow"
 version = "1.0.4"
@@ -1320,6 +3702,45 @@ version = "0.57.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ebf944e87a7c253233ad6766e082e3cd714b5d03812acc24c318f549614536e"
 
+[[package]]
+name = "writeable"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ad82d2a33cdc9674dc7465672f271e096168fcdbe0f799d9e6db8c5892679dc"
+
+[[package]]
+name = "xattr"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32e45ad4206f6d2479085147f02bc2ef834ac85886624a23575ae137c8aa8156"
+dependencies = [
+ "libc",
+ "rustix",
+]
+
+[[package]]
+name = "yoke"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "709fe23a0424b6a435d82152b1bd3fdfb0833487d5fa90d05d42762a9891fef5"
+dependencies = [
+ "stable_deref_trait",
+ "yoke-derive",
+ "zerofrom",
+]
+
+[[package]]
+name = "yoke-derive"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de844c262c8848816172cef550288e7dc6c7b7814b4ee56b3e1553f275f1858e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+ "synstructure",
+]
+
 [[package]]
 name = "zerocopy"
 version = "0.8.56"
@@ -1340,6 +3761,72 @@ dependencies = [
  "syn 2.0.119",
 ]
 
+[[package]]
+name = "zerofrom"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ec05a11813ea801ff6d75110ad09cd0824ddba17dfe17128ea0d5f68e6c5272"
+dependencies = [
+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11532158c46691caf0f2593ea8358fed6bbf68a0315e80aae9bd41fbade684a1"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+ "synstructure",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e13c156562582aa81c60cb29407084cdb54c4164760106ab78e6c5b0858cf64e"
+
+[[package]]
+name = "zerotrie"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ea269c3bd32f0a32c321907a2ae912ba6f4649bb0fc764a15627e99a7095a3f"
+dependencies = [
+ "displaydoc",
+ "yoke",
+ "zerofrom",
+]
+
+[[package]]
+name = "zerovec"
+version = "0.11.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb0464e17806c1d976d5cba29399c7f08e516e279e2ba493f63123b5fca67dd8"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.11.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34df6fc39dbd26ddc9c10e6a2984476e13acce22e64e4487636ef494369225da"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 3.0.4",
+]
+
+[[package]]
+name = "zlib-rs"
+version = "0.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34b31d188d9d685a4f9c7b46d6e36631b07058d2cfe190267adce54dc230bf12"
+
 [[package]]
 name = "zmij"
 version = "1.0.23"
diff --git a/Cargo.toml b/Cargo.toml
index a950491..a3b0bed 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,6 +31,10 @@ expect-test = "1.5.1"
 proptest = "1.11.0"
 quick-xml = "0.42.0"
 toml = "1.1.4"
+gix = { version = "0.87.1", default-features = false, features = ["blocking-http-transport-reqwest-rust-tls", "blocking-network-client", "worktree-mutation", "revision", "credentials", "sha1", "sha256", "parallel", "pack-cache-lru-static"] }
+reqwest = { version = "0.13", default-features = false, features = ["blocking", "rustls"] }
+flate2 = { version = "1.0.17", features = ["zlib-rs"], default-features = false }
+tar = "0.4"
 
 [profile.dev.package."*"]
 opt-level = 3
@@ -38,3 +42,9 @@ opt-level = 3
 [profile.dev]
 opt-level = 2
 split-debuginfo = "packed"
+
+[profile.release]
+lto = "thin"
+opt-level = "s"
+strip = true
+
diff --git a/rix-cli/src/main.rs b/rix-cli/src/main.rs
index ca065c8..8158387 100644
--- a/rix-cli/src/main.rs
+++ b/rix-cli/src/main.rs
@@ -1,7 +1,6 @@
 use clap::Parser;
 use nix_eval::Evaluator;
 use rootcause::{Report, report};
-use std::fs;
 use std::io::{self, Read};
 
 /// A pure Rust Nix expression evaluator
@@ -24,27 +23,27 @@ struct Args {
 fn main() -> Result<(), Report> {
     let args = Args::parse();
 
-    // Get the Nix expression to evaluate
-    let expr = if args.file {
-        // Read from file
+    // Create evaluator
+    let evaluator = Evaluator::new();
+
+    let value = if args.file {
         let path = args
             .expression
             .ok_or_else(|| report!("File path required when using --file"))?;
-        fs::read_to_string(&path)?
-    } else if let Some(expr) = args.expression {
-        // Use provided expression
-        expr
+        evaluator
+            .evaluate_from_file(std::path::Path::new(&path))
+            .map_err(|e| report!("{}", e))?
     } else {
-        // Read from stdin
-        let mut buffer = String::new();
-        io::stdin().read_to_string(&mut buffer)?;
-        buffer
+        let expr = if let Some(expr) = args.expression {
+            expr
+        } else {
+            let mut buffer = String::new();
+            io::stdin().read_to_string(&mut buffer)?;
+            buffer
+        };
+        evaluator.evaluate(&expr).map_err(|e| report!("{}", e))?
     };
 
-    // Create evaluator and evaluate
-    let evaluator = Evaluator::new();
-    let value = evaluator.evaluate(&expr).map_err(|e| report!("{}", e))?;
-
     // Output the result
     if args.json {
         println!("{}", serde_json::to_string_pretty(&value)?);
diff --git a/rix-eval/Cargo.toml b/rix-eval/Cargo.toml
index 2604490..07aa9ad 100644
--- a/rix-eval/Cargo.toml
+++ b/rix-eval/Cargo.toml
@@ -24,6 +24,10 @@ codespan-reporting.workspace = true
 regex.workspace = true
 quick-xml.workspace = true
 toml.workspace = true
+gix.workspace = true
+reqwest.workspace = true
+flate2.workspace = true
+tar.workspace = true
 rix-parser.workspace = true
 
 [dev-dependencies]
diff --git a/rix-eval/src/builtins.rs b/rix-eval/src/builtins.rs
index d98b88a..8027220 100644
--- a/rix-eval/src/builtins.rs
+++ b/rix-eval/src/builtins.rs
@@ -4272,3 +4272,499 @@ impl HashFileBuiltin {
         Ok(NixValue::String(result))
     }
 }
+
+// -----------------------------------------------------------------------------
+// Network & VCS Fetch Builtins (gitoxide + reqwest w/ rustls)
+// -----------------------------------------------------------------------------
+
+fn get_rix_cache_dir(sub: &str) -> std::path::PathBuf {
+    if let Ok(dir) = std::env::var("RIX_CACHE_DIR") {
+        std::path::PathBuf::from(dir).join(sub)
+    } else if let Ok(home) = std::env::var("HOME") {
+        std::path::PathBuf::from(home)
+            .join(".cache")
+            .join("rix")
+            .join(sub)
+    } else {
+        std::env::temp_dir().join("rix-cache").join(sub)
+    }
+}
+
+fn clone_shallow_repo(
+    url: &str,
+    ref_name: Option<&str>,
+    target_dir: &std::path::Path,
+) -> Result<(String, String)> {
+    let mut prepare = gix::prepare_clone(url.to_string(), target_dir)
+        .map_err(|e| Error::UnsupportedExpression {
+            reason: format!("fetchGit: failed to prepare clone from '{}': {}", url, e),
+        })?
+        .with_shallow(gix::remote::fetch::Shallow::DepthAtRemote(
+            std::num::NonZeroU32::new(1).unwrap(),
+        ))
+        .configure_remote(|remote| Ok(remote.with_fetch_tags(gix::remote::fetch::Tags::None)));
+
+    if let Some(r) = ref_name {
+        prepare = prepare
+            .with_ref_name(Some(r))
+            .map_err(|e| Error::UnsupportedExpression {
+                reason: format!("fetchGit: invalid ref name '{}': {}", r, e),
+            })?;
+    }
+    let (mut checkout, _) = prepare
+        .fetch_then_checkout(
+            gix::progress::Discard,
+            &std::sync::atomic::AtomicBool::new(false),
+        )
+        .map_err(|e| Error::UnsupportedExpression {
+            reason: format!("fetchGit: failed to fetch from '{}': {}", url, e),
+        })?;
+    let (repo, _) = checkout
+        .main_worktree(
+            gix::progress::Discard,
+            &std::sync::atomic::AtomicBool::new(false),
+        )
+        .map_err(|e| Error::UnsupportedExpression {
+            reason: format!("fetchGit: failed to checkout from '{}': {}", url, e),
+        })?;
+
+    let head_id = repo.head_id().map_err(|e| Error::UnsupportedExpression {
+        reason: format!("fetchGit: failed to get HEAD for '{}': {}", url, e),
+    })?;
+    let sha = head_id.to_string();
+    let short = sha.chars().take(7).collect::<String>();
+    Ok((sha, short))
+}
+
+pub struct FetchGitBuiltin;
+
+impl Builtin for FetchGitBuiltin {
+    fn name(&self) -> &str {
+        "fetchGit"
+    }
+
+    fn call_with_evaluator(&self, args: &[NixValue], evaluator: &Evaluator) -> Result<NixValue> {
+        if args.is_empty() || args.len() > 1 {
+            return Err(Error::UnsupportedExpression {
+                reason: format!("fetchGit takes 1 argument, got {}", args.len()),
+            });
+        }
+
+        let forced = args[0].clone().force(evaluator)?;
+        let (url, rev, ref_name, submodules) = match forced {
+            NixValue::String(s) => (s, None, None, false),
+            NixValue::AttributeSet(map) => {
+                let url = match map.get("url") {
+                    Some(val) => match val.clone().force(evaluator)? {
+                        NixValue::String(s) => s,
+                        other => {
+                            return Err(Error::UnsupportedExpression {
+                                reason: format!("fetchGit: url must be a string, got {}", other),
+                            });
+                        }
+                    },
+                    None => {
+                        return Err(Error::UnsupportedExpression {
+                            reason: "fetchGit: missing 'url' attribute".to_string(),
+                        });
+                    }
+                };
+                let rev = match map.get("rev") {
+                    Some(val) => match val.clone().force(evaluator)? {
+                        NixValue::String(s) => Some(s),
+                        _ => None,
+                    },
+                    None => None,
+                };
+                let ref_name = match map.get("ref") {
+                    Some(val) => match val.clone().force(evaluator)? {
+                        NixValue::String(s) => Some(s),
+                        _ => None,
+                    },
+                    None => None,
+                };
+                let submodules = match map.get("submodules") {
+                    Some(val) => match val.clone().force(evaluator)? {
+                        NixValue::Boolean(b) => b,
+                        _ => false,
+                    },
+                    None => false,
+                };
+                (url, rev, ref_name, submodules)
+            }
+            other => {
+                return Err(Error::UnsupportedExpression {
+                    reason: format!(
+                        "fetchGit: argument must be a string or attribute set, got {}",
+                        other
+                    ),
+                });
+            }
+        };
+
+        // Cache directory key based on url + rev/ref
+        let cache_key = {
+            use sha2::{Digest, Sha256};
+            let mut hasher = Sha256::new();
+            hasher.update(url.as_bytes());
+            if let Some(r) = &rev {
+                hasher.update(b":rev:");
+                hasher.update(r.as_bytes());
+            }
+            if let Some(rf) = &ref_name {
+                hasher.update(b":ref:");
+                hasher.update(rf.as_bytes());
+            }
+            hex::encode(hasher.finalize())
+        };
+
+        let git_cache = get_rix_cache_dir("git");
+        let target_dir = git_cache.join(&cache_key);
+
+        let (commit_sha, short_sha) = if target_dir.exists() && target_dir.join(".git").exists() {
+            // Cache hit, open repo
+            let valid = gix::open(&target_dir).ok().and_then(|r| {
+                r.head_id().ok().map(|h| {
+                    let sha = h.to_string();
+                    let short = sha.chars().take(7).collect::<String>();
+                    (sha, short)
+                })
+            });
+            match valid {
+                Some((sha, short)) => (sha, short),
+                None => {
+                    let _ = std::fs::remove_dir_all(&target_dir);
+                    clone_shallow_repo(&url, ref_name.as_deref(), &target_dir)?
+                }
+            }
+        } else {
+            let _ = std::fs::create_dir_all(&git_cache);
+            let _ = std::fs::remove_dir_all(&target_dir);
+            clone_shallow_repo(&url, ref_name.as_deref(), &target_dir)?
+        };
+
+        let mut result_map = HashMap::new();
+        result_map.insert("outPath".to_string(), NixValue::Path(target_dir));
+        result_map.insert("rev".to_string(), NixValue::String(commit_sha));
+        result_map.insert("shortRev".to_string(), NixValue::String(short_sha));
+        result_map.insert("submodules".to_string(), NixValue::Boolean(submodules));
+
+        Ok(NixValue::AttributeSet(result_map))
+    }
+
+    fn call(&self, _args: &[NixValue]) -> Result<NixValue> {
+        Err(Error::UnsupportedExpression {
+            reason: "fetchGit requires evaluator context".to_string(),
+        })
+    }
+}
+
+pub struct FetchurlBuiltin;
+
+impl Builtin for FetchurlBuiltin {
+    fn name(&self) -> &str {
+        "fetchurl"
+    }
+
+    fn call_with_evaluator(&self, args: &[NixValue], evaluator: &Evaluator) -> Result<NixValue> {
+        if args.is_empty() || args.len() > 1 {
+            return Err(Error::UnsupportedExpression {
+                reason: format!("fetchurl takes 1 argument, got {}", args.len()),
+            });
+        }
+
+        let forced = args[0].clone().force(evaluator)?;
+        let (url, expected_sha256) = match forced {
+            NixValue::String(s) => (s, None),
+            NixValue::AttributeSet(map) => {
+                let url = match map.get("url") {
+                    Some(val) => match val.clone().force(evaluator)? {
+                        NixValue::String(s) => s,
+                        other => {
+                            return Err(Error::UnsupportedExpression {
+                                reason: format!("fetchurl: url must be a string, got {}", other),
+                            });
+                        }
+                    },
+                    None => {
+                        return Err(Error::UnsupportedExpression {
+                            reason: "fetchurl: missing 'url' attribute".to_string(),
+                        });
+                    }
+                };
+                let sha256 = match map.get("sha256") {
+                    Some(val) => match val.clone().force(evaluator)? {
+                        NixValue::String(s) => Some(s),
+                        _ => None,
+                    },
+                    None => None,
+                };
+                (url, sha256)
+            }
+            other => {
+                return Err(Error::UnsupportedExpression {
+                    reason: format!(
+                        "fetchurl: argument must be string or attribute set, got {}",
+                        other
+                    ),
+                });
+            }
+        };
+
+        let file_cache = get_rix_cache_dir("files");
+        std::fs::create_dir_all(&file_cache).map_err(Error::IoError)?;
+
+        let hash_key = {
+            use sha2::{Digest, Sha256};
+            let mut hasher = Sha256::new();
+            hasher.update(url.as_bytes());
+            if let Some(s) = &expected_sha256 {
+                hasher.update(s.as_bytes());
+            }
+            hex::encode(hasher.finalize())
+        };
+
+        let target_file = file_cache.join(&hash_key);
+        if !target_file.exists() {
+            let client = reqwest::blocking::Client::builder()
+                .use_rustls_tls()
+                .build()
+                .map_err(|e| Error::UnsupportedExpression {
+                    reason: format!("fetchurl: failed to build HTTP client: {}", e),
+                })?;
+            let resp = client
+                .get(&url)
+                .send()
+                .map_err(|e| Error::UnsupportedExpression {
+                    reason: format!("fetchurl: failed to download '{}': {}", url, e),
+                })?;
+            let bytes = resp.bytes().map_err(|e| Error::UnsupportedExpression {
+                reason: format!("fetchurl: failed to read response from '{}': {}", url, e),
+            })?;
+
+            if let Some(expected) = &expected_sha256 {
+                use sha2::{Digest, Sha256};
+                let mut hasher = Sha256::new();
+                hasher.update(&bytes);
+                let actual = hex::encode(hasher.finalize());
+                if &actual != expected {
+                    return Err(Error::UnsupportedExpression {
+                        reason: format!(
+                            "fetchurl: sha256 mismatch for '{}': expected {}, got {}",
+                            url, expected, actual
+                        ),
+                    });
+                }
+            }
+            std::fs::write(&target_file, bytes).map_err(Error::IoError)?;
+        }
+
+        Ok(NixValue::Path(target_file))
+    }
+
+    fn call(&self, _args: &[NixValue]) -> Result<NixValue> {
+        Err(Error::UnsupportedExpression {
+            reason: "fetchurl requires evaluator context".to_string(),
+        })
+    }
+}
+
+pub struct FetchTarballBuiltin;
+
+impl Builtin for FetchTarballBuiltin {
+    fn name(&self) -> &str {
+        "fetchTarball"
+    }
+
+    fn call_with_evaluator(&self, args: &[NixValue], evaluator: &Evaluator) -> Result<NixValue> {
+        if args.is_empty() || args.len() > 1 {
+            return Err(Error::UnsupportedExpression {
+                reason: format!("fetchTarball takes 1 argument, got {}", args.len()),
+            });
+        }
+
+        let forced = args[0].clone().force(evaluator)?;
+        let (url, expected_sha256) = match forced {
+            NixValue::String(s) => (s, None),
+            NixValue::AttributeSet(map) => {
+                let url = match map.get("url") {
+                    Some(val) => match val.clone().force(evaluator)? {
+                        NixValue::String(s) => s,
+                        other => {
+                            return Err(Error::UnsupportedExpression {
+                                reason: format!(
+                                    "fetchTarball: url must be a string, got {}",
+                                    other
+                                ),
+                            });
+                        }
+                    },
+                    None => {
+                        return Err(Error::UnsupportedExpression {
+                            reason: "fetchTarball: missing 'url' attribute".to_string(),
+                        });
+                    }
+                };
+                let sha256 = match map.get("sha256") {
+                    Some(val) => match val.clone().force(evaluator)? {
+                        NixValue::String(s) => Some(s),
+                        _ => None,
+                    },
+                    None => None,
+                };
+                (url, sha256)
+            }
+            other => {
+                return Err(Error::UnsupportedExpression {
+                    reason: format!(
+                        "fetchTarball: argument must be string or attribute set, got {}",
+                        other
+                    ),
+                });
+            }
+        };
+
+        let tarball_cache = get_rix_cache_dir("tarballs");
+        std::fs::create_dir_all(&tarball_cache).map_err(Error::IoError)?;
+
+        let hash_key = {
+            use sha2::{Digest, Sha256};
+            let mut hasher = Sha256::new();
+            hasher.update(url.as_bytes());
+            if let Some(s) = &expected_sha256 {
+                hasher.update(s.as_bytes());
+            }
+            hex::encode(hasher.finalize())
+        };
+
+        let target_dir = tarball_cache.join(&hash_key);
+        if !target_dir.exists() {
+            let client = reqwest::blocking::Client::builder()
+                .use_rustls_tls()
+                .build()
+                .map_err(|e| Error::UnsupportedExpression {
+                    reason: format!("fetchTarball: failed to build HTTP client: {}", e),
+                })?;
+            let resp = client
+                .get(&url)
+                .send()
+                .map_err(|e| Error::UnsupportedExpression {
+                    reason: format!("fetchTarball: failed to download '{}': {}", url, e),
+                })?;
+            let bytes = resp.bytes().map_err(|e| Error::UnsupportedExpression {
+                reason: format!(
+                    "fetchTarball: failed to read response from '{}': {}",
+                    url, e
+                ),
+            })?;
+
+            if let Some(expected) = &expected_sha256 {
+                use sha2::{Digest, Sha256};
+                let mut hasher = Sha256::new();
+                hasher.update(&bytes);
+                let actual = hex::encode(hasher.finalize());
+                if &actual != expected {
+                    return Err(Error::UnsupportedExpression {
+                        reason: format!(
+                            "fetchTarball: sha256 mismatch for '{}': expected {}, got {}",
+                            url, expected, actual
+                        ),
+                    });
+                }
+            }
+
+            let tar_gz = flate2::read::GzDecoder::new(&bytes[..]);
+            let mut archive = tar::Archive::new(tar_gz);
+            let temp_dir = tarball_cache.join(format!("{}.tmp", &hash_key));
+            let _ = std::fs::remove_dir_all(&temp_dir);
+            std::fs::create_dir_all(&temp_dir).map_err(Error::IoError)?;
+            archive.unpack(&temp_dir).map_err(Error::IoError)?;
+
+            // If the unpacked directory contains a single top-level directory, strip it
+            let entries = std::fs::read_dir(&temp_dir)
+                .map_err(Error::IoError)?
+                .filter_map(|e| e.ok())
+                .collect::<Vec<_>>();
+            if entries.len() == 1 && entries[0].path().is_dir() {
+                std::fs::rename(entries[0].path(), &target_dir).map_err(Error::IoError)?;
+                let _ = std::fs::remove_dir_all(&temp_dir);
+            } else {
+                std::fs::rename(&temp_dir, &target_dir).map_err(Error::IoError)?;
+            }
+        }
+
+        Ok(NixValue::Path(target_dir))
+    }
+
+    fn call(&self, _args: &[NixValue]) -> Result<NixValue> {
+        Err(Error::UnsupportedExpression {
+            reason: "fetchTarball requires evaluator context".to_string(),
+        })
+    }
+}
+
+pub struct FetchTreeBuiltin;
+
+impl Builtin for FetchTreeBuiltin {
+    fn name(&self) -> &str {
+        "fetchTree"
+    }
+
+    fn call_with_evaluator(&self, args: &[NixValue], evaluator: &Evaluator) -> Result<NixValue> {
+        if args.is_empty() || args.len() > 1 {
+            return Err(Error::UnsupportedExpression {
+                reason: format!("fetchTree takes 1 argument, got {}", args.len()),
+            });
+        }
+
+        let forced = args[0].clone().force(evaluator)?;
+        match forced {
+            NixValue::String(s) => {
+                FetchGitBuiltin.call_with_evaluator(&[NixValue::String(s)], evaluator)
+            }
+            NixValue::AttributeSet(map) => {
+                let fetch_type = match map.get("type") {
+                    Some(val) => match val.clone().force(evaluator)? {
+                        NixValue::String(s) => s,
+                        _ => "git".to_string(),
+                    },
+                    None => "git".to_string(),
+                };
+
+                match fetch_type.as_str() {
+                    "git" => FetchGitBuiltin
+                        .call_with_evaluator(&[NixValue::AttributeSet(map)], evaluator),
+                    "tarball" => {
+                        let path_val = FetchTarballBuiltin
+                            .call_with_evaluator(&[NixValue::AttributeSet(map)], evaluator)?;
+                        let mut res = HashMap::new();
+                        res.insert("outPath".to_string(), path_val);
+                        Ok(NixValue::AttributeSet(res))
+                    }
+                    "file" => {
+                        let path_val = FetchurlBuiltin
+                            .call_with_evaluator(&[NixValue::AttributeSet(map)], evaluator)?;
+                        let mut res = HashMap::new();
+                        res.insert("outPath".to_string(), path_val);
+                        Ok(NixValue::AttributeSet(res))
+                    }
+                    other => Err(Error::UnsupportedExpression {
+                        reason: format!("fetchTree: unsupported type '{}'", other),
+                    }),
+                }
+            }
+            other => Err(Error::UnsupportedExpression {
+                reason: format!(
+                    "fetchTree: argument must be string or attribute set, got {}",
+                    other
+                ),
+            }),
+        }
+    }
+
+    fn call(&self, _args: &[NixValue]) -> Result<NixValue> {
+        Err(Error::UnsupportedExpression {
+            reason: "fetchTree requires evaluator context".to_string(),
+        })
+    }
+}
diff --git a/rix-eval/src/eval/evaluator.rs b/rix-eval/src/eval/evaluator.rs
index 4d1e99c..57b501f 100644
--- a/rix-eval/src/eval/evaluator.rs
+++ b/rix-eval/src/eval/evaluator.rs
@@ -180,6 +180,10 @@ impl Evaluator {
         self.register_builtin(Box::new(crate::builtins::FromTOMLBuiltin));
         self.register_builtin(Box::new(crate::builtins::GetEnvBuiltin));
         self.register_builtin(Box::new(crate::builtins::HashFileBuiltin));
+        self.register_builtin(Box::new(crate::builtins::FetchGitBuiltin));
+        self.register_builtin(Box::new(crate::builtins::FetchurlBuiltin));
+        self.register_builtin(Box::new(crate::builtins::FetchTarballBuiltin));
+        self.register_builtin(Box::new(crate::builtins::FetchTreeBuiltin));
     }
 
     /// Get a builtin function by name
diff --git a/rix-eval/src/eval/expressions/literals.rs b/rix-eval/src/eval/expressions/literals.rs
index 9d45db1..1fff5a3 100644
--- a/rix-eval/src/eval/expressions/literals.rs
+++ b/rix-eval/src/eval/expressions/literals.rs
@@ -56,8 +56,19 @@ impl Evaluator {
                             NixValue::Path(p) => p.display().to_string(),
                             NixValue::StorePath(p) => p.clone(),
                             NixValue::Derivation(drv) => format!("<derivation {}>", drv.name),
+                            NixValue::AttributeSet(ref attrs) => {
+                                if let Some(out_path) = attrs.get("outPath") {
+                                    let forced = out_path.clone().force(self)?;
+                                    match forced {
+                                        NixValue::String(s) => s,
+                                        NixValue::Path(p) => p.display().to_string(),
+                                        _ => format!("{}", forced),
+                                    }
+                                } else {
+                                    format!("{}", value_forced)
+                                }
+                            }
                             NixValue::List(_)
-                            | NixValue::AttributeSet(_)
                             | NixValue::Thunk(_)
                             | NixValue::DeferredLookup(_, _)
                             | NixValue::DeferredInherit(_, _)