anchor.diff:  { stdenv
   , fetchurl
  -, autoconf
  -, automake
   , intltool
  +, lib
  +, meson
  +, ninja
  +, vala
   
   , argyllcms
   , bash-completion
  
positive.code:         outputHash
          outputHashAlgo
          urls;
        sha1Urls =  map (n: "${n}.sha1") urls;
        pgpsigUrls = map (n: "${n}.asc") urls;
        pgpKeyFingerprint = "163EB 50119 225DB 3DF8F  49EA1 7ACBA 8DFA9 70E17";
        failEarly = true;
      };
    };
  
    meta = with stdenv.lib; {
      description = "Accurately color manage input and output devices";
      homepage = http://www.freedesktop.org/software/colord/intro.html;
      license = licenses.lgpl2Plus;
  
negative.code: , libusb
  , polkit
  , sqlite
  , systemd-dummy
  , systemd_lib
  }:
  
  let
    inherit (lib)
      boolEn;
  in
  stdenv.mkDerivation rec {
    name = "colord-1.4.2";
  
    src = fetchurl rec {
      url = "https://www.freedesktop.org/software/colord/releases/${name}.tar.xz";
      multihash = "Qme1Y2w1Carc9UXwU7LiVibZmMDznUC9rP8CDrgeWfnVct";
      hashOutput = false;
      sha256 = "4c70d5052a9c96da51fa57e80d6dc97ca642943d5b9940a196c990dfe84beca7";
    };
  
    nativeBuildInputs = [
      intltool
      meson
      ninja
      vala
    ];
  
  