when:
  - event: pull_request

steps:
  - name: "Run treefmt"
    image: docker.nix-community.org/nixpkgs/nix-flakes
    commands:
      - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
      - nix fmt --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt -- --fail-on-change
    volumes:
      - /nix:/mnt/nix:ro