anchor.diff:  
   let
     inherit (stdenv.lib)
  -    enFlag;
  +    boolEn;
   in
  -
   stdenv.mkDerivation rec {
     name = "colord-gtk-0.1.26";
   
     src = fetchurl rec {
       url = "https://www.freedesktop.org/software/colord/releases/${name}.tar.xz";
  -    sha1Url = "${url}.sha1";
       sha256 = "28d00b7f157ea3e2ea5315387b2660fde82faba16674861c50465e55d61a3e45";
       hashOutput = false;
     };
  
positive.code:   ];
  
    configureFlags = [
      (enFlag "introspection" (gobject-introspection != null) null)
      "--disable-gtk-doc"
      "--disable-gtk-doc-html"
      "--disable-gtk-doc-pdf"
  
negative.code:     "--enable-rpath"
      "--enable-schemas-compile"
      "--disable-gtk2"
      "--${boolEn (vala != null)}-vala"
    ];
  
    CFLAGS = "-Wno-deprecated-declarations";
  