diff --git a/.github/workflows/python-release.yml b/.github/workflows/python-release.yml
index da0291fb4..ec17336c3 100644
--- a/.github/workflows/python-release.yml
+++ b/.github/workflows/python-release.yml
@@ -231,16 +231,16 @@ jobs:
 
       - name: Install PR smoke artifacts
         run: |
-          uv pip install --system --force-reinstall ./pr-smoke-artifacts/pecos-rslib/pecos_rslib-*.whl
-          uv pip install --system --force-reinstall ./pr-smoke-artifacts/pecos-rslib-llvm/pecos_rslib_llvm-*.whl
-          uv pip install --system \
-            "phir>=0.3.3" \
-            "networkx>=2.1.0" \
-            "guppylang>=0.21.6" \
-            "tket<0.12.16" \
-            "hugr>=0.13.0" \
-            "selene-sim~=0.2.0"
-          uv pip install --system --force-reinstall --no-deps ./pr-smoke-artifacts/quantum-pecos/quantum_pecos-*.whl
+          # Install all three local wheels in ONE resolver invocation: the local
+          # wheels satisfy quantum-pecos's exact pecos-rslib/-llvm pins (which do
+          # not exist on PyPI for unreleased versions) and every other dependency
+          # resolves from the wheel's own Requires-Dist -- no hand-maintained
+          # duplicate pin list that can drift from the package metadata.
+          uv pip install --system --force-reinstall \
+            ./pr-smoke-artifacts/pecos-rslib/pecos_rslib-*.whl \
+            ./pr-smoke-artifacts/pecos-rslib-llvm/pecos_rslib_llvm-*.whl \
+            ./pr-smoke-artifacts/quantum-pecos/quantum_pecos-*.whl
+          uv pip check --system
 
       - name: Import PR smoke artifacts
         run: |
diff --git a/.github/workflows/python-test.yml b/.github/workflows/python-test.yml
index 42c0df2ea..59dc369a2 100644
--- a/.github/workflows/python-test.yml
+++ b/.github/workflows/python-test.yml
@@ -492,14 +492,17 @@ jobs:
           uv pip install --system --force-reinstall "${llvm_wheels[0]}"
         fi
         if [ "${{ matrix.include-pecos }}" = "true" ]; then
-          uv pip install --system \
-            "phir>=0.3.3" \
-            "networkx>=2.1.0" \
-            "guppylang>=0.21.6" \
-            "tket<0.12.16" \
-            "hugr>=0.13.0" \
-            "selene-sim~=0.2.0"
-          uv pip install --system --force-reinstall --no-deps ./python-compat-smoke-artifacts/quantum-pecos/quantum_pecos-*.whl
+          # One resolver invocation: the freshly built quantum-pecos wheel plus
+          # the already-installed local native wheels (re-passed so they satisfy
+          # its exact pecos-rslib/-llvm pins, which do not exist on PyPI for
+          # unreleased versions). All other dependencies resolve from the
+          # wheel's own Requires-Dist -- no hand-maintained pin list that can
+          # drift from the package metadata.
+          uv pip install --system --force-reinstall \
+            ./python-compat-smoke-artifacts/pecos-rslib/pecos_rslib-*.whl \
+            ./python-compat-smoke-artifacts/pecos-rslib-llvm/pecos_rslib_llvm-*.whl \
+            ./python-compat-smoke-artifacts/quantum-pecos/quantum_pecos-*.whl
+          uv pip check --system
         fi
 
     - name: Run Python compatibility smoke test