I'm not sure what needs changing, but the 18.04 images from earlier this year don't support environment files, so actions relying on them get error messages like this one:
/actions/actions-setup-elixir@v1/dist/install-otp: line 12: $GITHUB_PATH: ambiguous redirect
I'm not sure what needs changing, but the 18.04 images from earlier this year don't support environment files, so actions relying on them get error messages like this one: