{
  stdenv
}:

{
    hello = stdenv.mkDerivation rec {
      name = "dummy";

      src = null;
      dontUnpack = true;
      dontBuild = true;

      installPhase = ''
        mkdir -p $out/bin

        cat > $out/bin/dummy <<EOF
        #!/bin/sh
        echo Hello world!
        EOF

        chmod +x $out/bin/dummy
      '';
    };
}