anchor.diff:        # Purposefully overwrite libc-ldflags-before, cctools ld doesn't know dynamic-linker and cc-wrapper doesn't do cross-compilation well enough to adjust
         echo "-arch ${arch} -L${sdk}/usr/lib ${lib.optionalString simulator "-L${sdk}/usr/lib/system "}-i${if simulator then "os_simulator" else "phoneos"}_version_min 7.0.0" > $out/nix-support/libc-ldflags-before
       '';
  -  };
  -in {
  -  cc = runCommand "${prefix}-cc" { passthru = { inherit sdkType sdkVer sdk; }; } ''
  -    mkdir -p $out/bin
  -    ln -sv ${wrapper}/bin/clang $out/bin/${prefix}-cc
  -    mkdir -p $out/nix-support
  -    echo ${llvm} > $out/nix-support/propagated-native-build-inputs
  -    cat > $out/nix-support/setup-hook <<EOF
  -    if test "\$dontSetConfigureCross" != "1"; then
  -        configureFlags="\$configureFlags --host=${prefix}"
  -    fi
  -    EOF
  -    fixupPhase
  -  '';
  -
  -  binutils = runCommand "${prefix}-binutils" {} ''
  -    mkdir -p $out/bin
  -    ln -sv ${wrapper}/bin/ld $out/bin/${prefix}-ld
  -    for prog in ar nm ranlib; do
  -      ln -s ${binutils}/bin/$prog $out/bin/${prefix}-$prog
  -    done
  -    fixupPhase
  -  '';
  -}
  +  }) // {
  +    inherit sdkType sdkVer sdk;
  +  }
  
positive.code: 
    sdk = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhone${sdkType}.platform/Developer/SDKs/iPhone${sdkType}${sdkVer}.sdk";
  
    /* TODO: Properly integrate with gcc-cross-wrapper */
    wrapper = import ../../../build-support/cc-wrapper {
      inherit stdenv coreutils gnugrep;
      nativeTools = false;
      nativeLibc = false;
      inherit binutils;
      libc = runCommand "empty-libc" {} "mkdir -p $out/{lib,include}";
      cc = clang;
      extraBuildCommands = ''
        if ! [ -d ${sdk} ]; then
            echo "You must have ${sdkVer} of the iPhone${sdkType} sdk installed at ${sdk}" >&2
  
negative.code: , stdenv
  , coreutils
  , gnugrep
  , hostPlatform, targetPlatform
  }:
  
  /* As of this writing, known-good prefix/arch/simulator triples:
  