[CI] source eenv

Author: CSY-ModelCloud

.github/workflows/unit_tests.yml

@@ -289,14 +289,16 @@ jobs:
       - name: Clear installer cache on failure
         if: failure()
         run: |
+          source "${{ matrix.env_name }}/bin/activate"
+
           INSTALL_CMD='${{ matrix.install_cmd }}'
 
           if [[ "$INSTALL_CMD" == uv* || "$INSTALL_CMD" == *" uv "* ]]; then
             echo "[INFO] Previous install command uses uv, clearing uv cache..."
             uv cache clean
           elif [[ "$INSTALL_CMD" == pip* || "$INSTALL_CMD" == *" pip "* ]]; then
             echo "[INFO] Previous install command uses pip, clearing pip cache..."
-            python -m pip cache purge || rm -rf ~/.cache/pip
+            pip cache purge || rm -rf ~/.cache/pip
           fi
           echo "RETRY_INSTALL=true" >> $GITHUB_ENV