Attempt 8 to get CI working on Mac

.github/workflows/CI.yaml

@@ -50,12 +50,6 @@ jobs:
           python -m pip install . --no-deps
           micromamba list
 
-      - name: Check formatting
-        shell: bash -l {0}
-        run: |
-          micromamba ruff check red
-          git diff --exit-code
-
       - name: Lint
         shell: bash -l {0}
         run: |

Makefile

@@ -2,6 +2,8 @@ PACKAGE_NAME := red
 PACKAGE_DIR  := red
 
 # If we're running in GitHub Actions, we need to use micromamba instead of conda.
+# Easiest way to do this is to avoid using conda run in GitHub Actions (since the environment
+# is already activated). Hence, set CONDA_ENV_RUN to an empty string if we're in GitHub Actions.
 CONDA_ENV_RUN   = $(if $(GITHUB_ACTIONS),,conda run --no-capture-output --name $(PACKAGE_NAME))
 
 TEST_ARGS := -v --cov=$(PACKAGE_NAME) --cov-report=term --cov-report=xml --junitxml=unit.xml --color=yes