diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dac89cf66..01c2b32a4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -471,7 +471,7 @@ jobs:
         run: echo $(which python3.8)
 
       - name: "Validate global Python install"
-        run: python3.8 scripts/check_system_python.py --uv ./uv
+        run: python3.8 scripts/check_system_python.py --uv ./uv --externally-managed
 
   system-test-macos-x86_64:
     needs: build-binary-macos-x86_64