diff --git a/.github/workflows/sky130-smoke.yml b/.github/workflows/sky130-smoke.yml
index 6aa6ce9..a35239e 100644
--- a/.github/workflows/sky130-smoke.yml
+++ b/.github/workflows/sky130-smoke.yml
@@ -19,16 +19,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Install Yosys and SymbiYosys
+      - name: Install Yosys, Boolector, and SymbiYosys
         shell: bash
         run: |
           set -euxo pipefail
           sudo apt-get update
-          sudo apt-get install -y yosys python3-pip
-          python3 -m pip install --user --upgrade pip
-          python3 -m pip install --user symbiyosys
-          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
-          which sby
+          sudo apt-get install -y yosys boolector
+          git init "$RUNNER_TEMP/sby"
+          git -C "$RUNNER_TEMP/sby" fetch --depth 1 https://github.com/YosysHQ/sby.git b1a1e98cba941ec8433f8dc27f416cd7bb7f14be
+          git -C "$RUNNER_TEMP/sby" checkout --detach FETCH_HEAD
+          sudo make -C "$RUNNER_TEMP/sby" install
+          yosys -V
           sby --version
       - name: Run formal checks
         shell: bash
@@ -42,10 +43,8 @@ jobs:
     continue-on-error: true
     steps:
       - uses: actions/checkout@v4
-      - name: Install docker (required for OpenLane)
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y docker.io
+      - name: Verify Docker
+        run: docker --version
       - name: OpenLane smoke check
         run: |
           docker run --rm -v "$(pwd):/work" -w /work \
diff --git a/formal/dpu_tile.sby b/formal/dpu_tile.sby
index 1a05b72..b7f92ad 100644
--- a/formal/dpu_tile.sby
+++ b/formal/dpu_tile.sby
@@ -3,7 +3,7 @@ mode prove
 depth 24
 
 [engines]
-smtbmc
+smtbmc boolector
 
 [script]
 read -formal dpu_tile.sv dpu_tile_properties.sv
@@ -12,4 +12,3 @@ prep -top dpu_tile_properties
 [files]
 rtl/dpu_tile.sv
 formal/dpu_tile_properties.sv
-