perl:

attrs:

perl.stdenv.mkDerivation (
  {
    doCheck = true;
    checkTarget = "test";
  }
  //
  attrs
  //
  {
    name = "perl-" + attrs.name;
    builder = ./builder.sh;
    buildInputs = [(if attrs ? buildInputs then attrs.buildInputs else []) perl];
  }
)