More exploration of python environment variables.

.github/workflows/main.yml

@@ -142,7 +142,8 @@ jobs:
             /Miniconda3/envs/${{ env.python_v3_name }}/bin/python -m pip install --trusted-host pypi.org --trusted-host pypi.python.org --trusted-host files.pythonhosted.org -r requirements.txt
             /Miniconda3/envs/${{ env.python_v4_name }}/bin/python -m pip install --trusted-host pypi.org --trusted-host pypi.python.org --trusted-host files.pythonhosted.org -r requirements.txt
           elif [ "${{ matrix.platform.os_type }}" == 'windows' ]; then
-            ${{ steps.four_pythons.outputs.python-path }}python -m pip install -r requirements.txt
+            echo "${{ steps.four_pythons.outputs }}"
+            ${{ env.pythonLocation }}python -m pip install -r requirements.txt
             python${{ env.python_v2_name }} -m pip install -r requirements.txt
             python${{ env.python_v3_name }} -m pip install -r requirements.txt
             python${{ env.python_v4_name }} -m pip install -r requirements.txt