anchor.diff: -{ stdenv, fetchhg, pkgconfig, libixp_hg, txt2tags, dash, python, which
  +{ stdenv, fetchurl, unzip, pkgconfig, libixp_hg, txt2tags, dash, python, which
   , libX11 , libXrender, libXext, libXinerama, libXrandr, libXft }:
   
   stdenv.mkDerivation rec {
  
positive.code:   version = "hg-2012-12-09";
    name = "wmii-${version}";
  
    src = fetchhg {
      url = https://code.google.com/p/wmii/;
      sha256 = "1wqw41jb2fhq902a04ixfzmx0lia1pawahm1ymyrs3is6mm32r51";
      inherit rev;
    };
  
    # for dlopen-ing
    patchPhase = ''
      substituteInPlace lib/libstuff/x11/xft.c --replace "libXft.so" "${libXft}/lib/libXft.so"
      substituteInPlace cmd/wmii.sh.sh --replace "\$(which which)" "${which}/bin/which"
    '';
  
  
negative.code:     EOF
    '';
  
    buildInputs = [ unzip pkgconfig libixp_hg txt2tags dash python which
                    libX11 libXrender libXext libXinerama libXrandr libXft ];
  
    # For some reason including mercurial in buildInputs did not help
    makeFlags = "WMII_HGVERSION=hg${rev}";
  
    meta = {
      homepage = "https://code.google.com/archive/p/wmii/";
      description = "A small window manager controlled by a 9P filesystem";
      maintainers = with stdenv.lib.maintainers; [ kovirobi ];
      license = stdenv.lib.licenses.mit;
  