args :  
let 
  lib = args.lib;
  fetchurl = args.fetchurl;
  FullDepEntry = args.FullDepEntry;

  version = lib.getAttr ["version"] "2008.03.30" args; 
  buildInputs = with args; [
    zlib sqlite gmp libffi cairo ncurses freetype mesa
    libpng libtiff libjpeg readline libsndfile libxml2
    freeglut e2fsprogs libsamplerate pcre
  ];
in
rec {
  src = /* Here a fetchurl expression goes */
    fetchurl {
      url = "http://github.com/stevedekorte/io/tarball/${version}";
      name = "io-${version}.tar.gz";
      sha256 = "1vdjyqv86l290kzhyw8mwzfqgb279dl9nqmy6bih6g8n4yz36ady";
    };

  inherit buildInputs;
  configureFlags = [];

  makeFlags = ["INSTALL_PREFIX=$out"];

  /* doConfigure should be specified separately */
  phaseNames = ["preBuild" "doMakeInstall"];
      
  preBuild = FullDepEntry (''
    for i in $pkgs ${
        if args.stdenv ? glibc then args.stdenv.glibc else ""
      }; do
        sed -i build/AddonBuilder.io -e '/"\/sw"/asearchPrefixes append("'"$i"'"); '
    done
  '') ["minInit" "addInputs" "doUnpack"];

  name = "io-" + version;
  meta = {
    description = "Io programming language";
  };
}