anchor.diff:  
     dubBuild = stdenv.mkDerivation rec {
       name = "dubBuild-${version}";
  -    version = "1.7.1";
  +    version = "1.7.2";
   
       enableParallelBuilding = true;
   
  
positive.code:     
      patches = dubBuild.patches;
  
      postPatch = dubBuild.postPatch;
  
      nativeBuildInputs = dubBuild.nativeBuildInputs;
  
negative.code:       })
      ];
  
      # Can be removed with https://github.com/dlang/dub/pull/1368
      dubvar = "\\$DUB";
      postPatch = ''
          substituteInPlace test/fetchzip.sh \
              --replace "dub remove" "\"${dubvar}\" remove"
      '';
  
      nativeBuildInputs = [ dmd libevent rsync ];
  