{
  stdenv,
  lib,
  bats,
  gitMinimal,
  python3,
  python3Packages,
  shellcheck-minimal,
  shfmt,
}:

let
  fs = lib.fileset;
in
stdenv.mkDerivation {
  pname = "mechanicaldiff";
  version = "0.0.1";

  src = fs.toSource {
    root = ./.;
    fileset = fs.unions [
      ./.editorconfig
      ./bin
      ./test
    ];
  };

  buildInputs = [ python3 ];

  postPatch = ''
    patchShebangs .
  '';

  doCheck = true;

  nativeCheckInputs = [
    (bats.withLibraries (p: [
      p.bats-assert
      p.bats-support
    ]))
    gitMinimal
    python3Packages.flake8
    shellcheck-minimal
    shfmt
  ];

  checkPhase = ''
    runHook preCheck
    flake8 bin/mechanicaldiff
    shellcheck test/mechanicaldiff.bats
    shfmt -d test/mechanicaldiff.bats
    bats test
    runHook postCheck
  '';

  installPhase = ''
    mkdir -p $out/bin
    cp $src/bin/mechanicaldiff $out/bin/mechanicaldiff
    chmod +x $out/bin/mechanicaldiff
  '';
}