anchor.diff:      buildCommand = ''
         mkdir -p $out/bin $out/lib $out/lib/system
   
  -      # We're not going to bundle the actual libSystem.dylib; instead we reconstruct it on
  -      # the other side. See the notes in stdenv/darwin/default.nix for more information.
  -      # We also need the .o files for various low-level boot stuff.
  +      # Copy libSystem's .o files for various low-level boot stuff.
         cp -d ${darwin.Libsystem}/lib/*.o $out/lib
  -      cp -d ${darwin.Libsystem}/lib/system/*.dylib $out/lib/system
   
         # Resolv is actually a link to another package, so let's copy it properly
         cp -L ${darwin.Libsystem}/lib/libresolv.9.dylib $out/lib
  
positive.code: 
        ${build}/on-server/sh -c 'echo Hello World'
  
        export flags="-idirafter ${unpack}/include-Libsystem --sysroot=${unpack} -L${unpack}/lib"
  
        export CPP="clang -E $flags"
        export CC="clang $flags -Wl,-rpath,${unpack}/lib -Wl,-v -Wl,-sdk_version,10.10"
  
negative.code:         fi
        done
  
        ln -s libresolv.9.dylib $out/lib/libresolv.dylib
  
        for i in $out/lib/*.dylib $out/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation; do
  