only append cmd_line/* to GITHUB_PATH if runner.os != Windows

Author: janosh

.github/workflows/test.yml

@@ -40,13 +40,15 @@ jobs:
           python-version: ${{ matrix.python-version }}
           cache: pip
           cache-dependency-path: setup.py
+      - name: Add CLIs to GITHUB_PATH
+        if: runner.os != 'Windows'
+        # This is the way to update env variables in a way that persist for the entire job.
+        run: |
+          for pkg in cmd_line/*;
+            do echo "$(pwd)/cmd_line/$pkg/Linux_64bit" >> "$GITHUB_PATH";
+          done
       - name: Install dependencies
         run: |
-          # Note that this is the way to update env variables in a way that persist for the entire job.
-          # for pkg in cmd_line/*;
-          #   do echo "$(pwd)/cmd_line/$pkg/Linux_64bit" >> "$GITHUB_PATH";
-          # done
-
           pip install --upgrade pip wheel
           pip install m3gnet
           pip install -e '.[dev,optional]'