anchor.diff:        buildInputs = [
           boost doxygen qt48Full libharu
           pango fcgi firebird libmysqlclient postgresql graphicsmagick glew
  -        openssl pcre harfbuzz
  +        openssl pcre harfbuzz icu
         ];
   
         cmakeFlags = [
  
positive.code:     };
  in {
    wt3 = generic {
      version = "3.5.0";
      sha256 = "1xcwzldbval5zrf7f3n2gkpscagg51cw2jp6p3q1yh6bi59haida";
    };
  
    wt4 = generic {
      version = "4.5.0";
      sha256 = "16svzdma2mc2ggnpy5z7m1ggzhd5nrccmmj8xnc7bd1dd3486xwv";
    };
  }
  
negative.code: { lib, stdenv, fetchFromGitHub, cmake, boost, pkg-config, doxygen, qt48Full, libharu
  , pango, fcgi, firebird, libmysqlclient, postgresql, graphicsmagick, glew, openssl
  , pcre, harfbuzz, icu
  }:
  
  let
  