anchor.diff:  { stdenv, fetchgit, fetchurl, cmake, llvm, curl, tzdata
   , python, libconfig, lit, gdb, unzip, darwin, bash
  -, callPackage
  +, callPackage, makeWrapper, targetPackages
   , bootstrapVersion ? false
   , version ? "1.8.0"
   , ldcSha256 ? "0zswjlibj8zcdj06nn09jjhbd99chsa5f4kps8xifzgrpgsa28g4"
  
positive.code:     ]);
  
  
      buildInputs = [ curl tzdata stdenv.cc ];
  
      preConfigure = ''
        cmakeFlagsArray=("-DINCLUDE_INSTALL_DIR=$out/include/dlang/ldc"
  
negative.code:             --replace "tzName == \"+VERSION\"" "baseName(tzName) == \"leapseconds\" || tzName == \"+VERSION\""
      '';
  
      nativeBuildInputs = [ cmake makeWrapper llvm bootstrapLdc python lit gdb unzip ]
  
      ++ stdenv.lib.optional (bootstrapVersion) [
        libconfig
  