Update python-package-conda.yml

.github/workflows/python-package-conda.yml

@@ -16,17 +16,18 @@ jobs:
         python-version: 3.8
     - name: Add conda to system path
       run: |
-        # $CONDA is an environment variable pointing to the root of the miniconda directory
         echo $CONDA/bin >> $GITHUB_PATH
+    - name: Configure Conda
+      run: |
+        conda config --add channels defaults
+        conda config --set channel_priority strict
     - name: Install dependencies
       run: |
-        conda env update --file environment.yml --name base
+        conda env update --file environment.yml --name base || conda env create --file environment.yml --name base
     - name: Lint with flake8
       run: |
         conda install flake8
-        # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test with pytest
       run: |