name: My Workflow
on: [push]

jobs:
  my_job:
    name: My Job on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}

    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest]

    steps:
      - uses: actions/checkout@master
      - name: nix
        run: |
          curl https://nixos.org/nix/install | sh
          . "$HOME"/.nix-profile/etc/profile.d/nix.sh
          ./test.bash