anchor.diff:          findfreetype libssh curl cmake autoconf automake libtool ed cpio coreutils
           libssh2 nghttp2 libkrb5 ninja;
   
  +      llvmPackages_7 = super.llvmPackages_7 // (let
  +        libraries = super.llvmPackages_7.libraries.extend (_: _: {
  +          inherit (llvmPackages_7) compiler-rt;
  +        });
  +      in { inherit libraries; } // libraries);
  +
         darwin = super.darwin // {
           inherit (darwin)
             dyld Libsystem xnu configd ICU libdispatch libclosure launchd CF;
  
positive.code:       python3 = super.python3Minimal;
  
        ninja = super.ninja.override { buildDocs = false; };
      };
    in with prevStage; stageFun 1 prevStage {
      extraPreHook = "export NIX_CFLAGS_COMPILE+=\" -F${bootstrapTools}/Library/Frameworks\"";
  
negative.code:             ln -s ${bootstrapTools}/lib/libc++abi.dylib $out/lib/libc++abi.dylib
            '';
          };
  
          compiler-rt = stdenv.mkDerivation {
            name = "bootstrap-stage0-compiler-rt";
            buildCommand = ''
              mkdir -p $out/lib
              ln -s ${bootstrapTools}/lib/libclang_rt* $out/lib
              ln -s ${bootstrapTools}/lib/darwin       $out/lib/darwin
            '';
          };
        };
      };
  
  