emacsPackages.hsc3-mode: use trivialBuild

{ lib, stdenv, fetchurl, emacs }:

{ lib, trivialBuild, fetchurl, haskell-mode }:

# this package installs the emacs-mode which

# resides in the hsc3 sources.

let version = "0.15";

in stdenv.mkDerivation {

trivialBuild rec {

  pname = "hsc3-mode";

  inherit version;

  version = "0.15";

  src = fetchurl {

    url = "mirror://hackage/hsc3-0.15/hsc3-0.15.tar.gz";

    url = "mirror://hackage/hsc3-${version}/hsc3-${version}.tar.gz";

    sha256 = "2f3b15655419cf8ebe25ab1c6ec22993b2589b4ffca7c3a75ce478ca78a0bde6";

  };

  buildInputs = [ emacs ];

  packageRequires = [ haskell-mode ];

  installPhase = ''

    mkdir -p "$out/share/emacs/site-lisp"

    cp "emacs/hsc3.el" "$out/share/emacs/site-lisp"

  '';

  sourceRoot = "hsc3-${version}/emacs";

  meta = {

    homepage = "http://rd.slavepianos.org/?t=hsc3";