diff --git a/.github/workflows/contemplation.yml b/.github/workflows/contemplation.yml
index e3a624e9..2face076 100644
--- a/.github/workflows/contemplation.yml
+++ b/.github/workflows/contemplation.yml
@@ -44,7 +44,7 @@ jobs:
           enable-cache: true
 
       - name: install dependencies
-        run: uv pip install -e ".[dev]" pyyaml
+        run: uv sync --locked --extra dev
 
       - name: run contemplation cycle
         id: run
diff --git a/.github/workflows/full-pytest.yml b/.github/workflows/full-pytest.yml
index 087ce13b..910eb078 100644
--- a/.github/workflows/full-pytest.yml
+++ b/.github/workflows/full-pytest.yml
@@ -53,7 +53,7 @@ jobs:
 
       - name: install dependencies
         run: |
-          uv pip install -e ".[dev]" pyyaml
+          uv sync --locked --extra dev
 
       - name: pytest (parallel, quarantine and slow excluded)
         env:
diff --git a/.github/workflows/lane-shas.yml b/.github/workflows/lane-shas.yml
index d0353253..9e979bd7 100644
--- a/.github/workflows/lane-shas.yml
+++ b/.github/workflows/lane-shas.yml
@@ -81,7 +81,7 @@ jobs:
       - name: install dependencies
         if: steps.paths.outputs.run == 'true'
         run: |
-          uv pip install -e . pyyaml pytest
+          uv sync --locked
 
       - name: verify lane SHAs
         if: steps.paths.outputs.run == 'true'
diff --git a/.github/workflows/nightly-full-pytest.yml b/.github/workflows/nightly-full-pytest.yml
index 1920e1fe..68c08d7e 100644
--- a/.github/workflows/nightly-full-pytest.yml
+++ b/.github/workflows/nightly-full-pytest.yml
@@ -50,7 +50,7 @@ jobs:
 
       - name: install dependencies
         run: |
-          uv pip install -e ".[dev]" pyyaml
+          uv sync --locked --extra dev
 
       - name: pytest (parallel, full suite, quarantine excluded)
         env:
diff --git a/.github/workflows/ratify-proposal.yml b/.github/workflows/ratify-proposal.yml
index c04a44da..a4a9643e 100644
--- a/.github/workflows/ratify-proposal.yml
+++ b/.github/workflows/ratify-proposal.yml
@@ -70,7 +70,7 @@ jobs:
           enable-cache: true
 
       - name: install dependencies
-        run: uv pip install -e ".[dev]"
+        run: uv sync --locked --extra dev
 
       - name: resolve review date
         id: date
diff --git a/.github/workflows/smoke.yml b/.github/workflows/smoke.yml
index acde38c1..bb052d5a 100644
--- a/.github/workflows/smoke.yml
+++ b/.github/workflows/smoke.yml
@@ -43,7 +43,7 @@ jobs:
 
       - name: install dependencies
         run: |
-          uv pip install -e ".[dev]" pyyaml
+          uv sync --locked --extra dev
 
       - name: pytest smoke suite
         env: