diff --git a/.github/workflows/test-shared.yml b/.github/workflows/test-shared.yml
index 96e862c35916..35a791c74df7 100644
--- a/.github/workflows/test-shared.yml
+++ b/.github/workflows/test-shared.yml
@@ -147,8 +147,6 @@ jobs:
         include:
           - runner: ubuntu-24.04
             system: x86_64-linux
-            # Exercise the trace-event code against a perfetto-enabled V8.
-            perfetto: true
           # built separately in build-aarch64-linux-v8
           # - runner: ubuntu-24.04-arm
           #   system: aarch64-linux
@@ -156,15 +154,23 @@ jobs:
             system: x86_64-darwin
           - runner: macos-latest
             system: aarch64-darwin
-    name: '${{ matrix.system }}: with shared libraries${{ matrix.perfetto && '' and perfetto'' || '''' }}'
+    name: '${{ matrix.system }}: with shared libraries'
     uses: ./.github/workflows/build-shared.yml
     with:
       runner: ${{ matrix.runner }}
       with-sccache: ${{ github.base_ref == 'main' || github.ref_name == 'main' }}
       extra-nix-flags: |
         --arg useSeparateDerivationForV8 true \
-        ${{ matrix.perfetto && '--arg withPerfetto true \' || '\' }}
-        ${{ endsWith(matrix.system, '-darwin') && '--arg withAmaro false --arg withLief false --arg withSQLite false --arg withFFI false --arg extraConfigFlags ''["--without-inspector" "--without-node-options"]'' \' || '\' }}
+        ${{ endsWith(matrix.system, '-darwin') && '\
+          --arg withAmaro false \
+          --arg withFFI false \
+          --arg withLief false \
+          --arg withPerfetto false \
+          --arg withSQLite false \
+          --arg extraConfigFlags ''[
+            "--without-inspector"
+            "--without-node-options"
+          ]'' \' || '\' }}
     secrets:
       CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}
 
diff --git a/configure.py b/configure.py
index 99ce9326dc93..42dcd5697b17 100755
--- a/configure.py
+++ b/configure.py
@@ -1140,11 +1140,11 @@
     default=None,
     help='disable the V8 inspector protocol')
 
-parser.add_argument('--with-perfetto',
+parser.add_argument('--without-perfetto',
     action='store_true',
-    dest='with_perfetto',
+    dest='without_perfetto',
     default=None,
-    help='enable perfetto support')
+    help='disable perfetto support')
 
 parser.add_argument('--shared',
     action='store_true',
@@ -2242,7 +2242,7 @@ def configure_v8(o, configs):
         options.v8_disable_temporal_support = True
   o['variables']['v8_enable_temporal_support'] = 0 if options.v8_disable_temporal_support else 1
   o['variables']['v8_trace_maps'] = 1 if options.trace_maps else 0
-  o['variables']['v8_use_perfetto'] = 1 if options.with_perfetto else 0
+  o['variables']['v8_use_perfetto'] = 0 if options.without_perfetto else 1
   o['variables']['node_use_v8_platform'] = b(not options.without_v8_platform)
   o['variables']['node_use_bundled_v8'] = b(not options.without_bundled_v8)
   o['variables']['force_dynamic_crt'] = 1 if options.shared else 0
diff --git a/shell.nix b/shell.nix
index 0bc13ec5c2f1..fb94abfeb24c 100644
--- a/shell.nix
+++ b/shell.nix
@@ -19,7 +19,7 @@
   withFFI ? true,
   withSSL ? true,
   withTemporal ? false,
-  withPerfetto ? false,
+  withPerfetto ? true,
   sharedLibDeps ? (
     import ./tools/nix/sharedLibDeps.nix {
       inherit
@@ -80,7 +80,7 @@ let
   ++ pkgs.lib.optional (builtins.hasAttr "abseil" sharedLibDeps) "--shared-abseil"
   ++ pkgs.lib.optional (builtins.hasAttr "highway" sharedLibDeps) "--shared-highway"
   ++ pkgs.lib.optional (withTemporal && useSharedTemporal) "--shared-temporal_capi"
-  ++ pkgs.lib.optional withPerfetto "--with-perfetto";
+  ++ pkgs.lib.optional (!withPerfetto) "--without-perfetto";
 in
 pkgs.mkShell {
   inherit nativeBuildInputs;
diff --git a/tools/nix/v8.nix b/tools/nix/v8.nix
index 98df8b769c2a..b665f3863e84 100644
--- a/tools/nix/v8.nix
+++ b/tools/nix/v8.nix
@@ -47,7 +47,7 @@ let
       ]
       ++ lib.optional (!useSharedAbseil) ../../tools/v8_gypfiles/abseil.gyp
       ++ lib.optional (!useSharedHighway) ../../tools/v8_gypfiles/highway.gyp
-      ++ lib.optionals (builtins.elem "--with-perfetto" configureFlags) [
+      ++ lib.optionals (!builtins.elem "--without-perfetto" configureFlags) [
         ../../deps/perfetto
       ]
       ++ lib.optionals (icu != null) [