let
  pkgs = import <nixpkgs> {};
in with pkgs; with pkgs.stdenv; rec {
  subtasks = rec {
    shellcheck = mkDerivation rec {
      name = "dotfiles-shellcheck";
      src = ./.;
      phases = "unpackPhase buildPhase";
      buildInputs = [ pkgs.shellcheck ];
      buildPhase = ''
        export SHELLCHECK_OPTS="-e SC1090 -e SC1091 -e SC2139"
        ignored='(encrypted|os-installation.sh|notmuch-post.sh)'
        find . -type f -name '*.sh' | grep -E -v $ignored | xargs shellcheck
        touch $out
      '';
    };
    fixme = mkDerivation {
      name = "dotfiles-fixme";
      src = ./.;
      phases = "unpackPhase buildPhase";
      buildInputs = [ pkgs.ag ];
      buildPhase = ''
        ag FIXME --ignore default.nix || {
          touch $out
        }
      '';
    };
  };
  test = mkDerivation rec {
    name = "dotfiles-test";
    src = ./.;
    phases = "unpackPhase buildPhase";
    buildInputs = [
      subtasks.shellcheck
      subtasks.fixme
    ];
    buildPhase = ''
      echo "Ran tests for:"
      for d in ${builtins.toString buildInputs}; do
        echo "  $d"
      done
      echo "All tests passed!"
      touch $out
    '';
  };
}