name: check flake

on:
  pull_request:
    paths:
      - "**.nix"
  push:
    paths:
      - "**.nix"
  workflow_dispatch:

jobs:
  check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - uses: cachix/install-nix-action@v19
        with:
          github_access_token: ${{ secrets.GITHUB_TOKEN }}

      - run: |
          export NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1
          export NIXPKGS_ALLOW_BROKEN=1
          export NIXPKGS_ALLOW_UNFREE=1
          nix flake check --impure