depot/third_party/nixpkgs/pkgs/os-specific/darwin/apple-sdk-11.0/libunwind.nix

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{ stdenvNoCC, buildPackages, MacOSX-SDK }:
stdenvNoCC.mkDerivation {
pname = "libunwind";
version = MacOSX-SDK.version;
dontUnpack = true;
dontBuild = true;
nativeBuildInputs = [ buildPackages.darwin.checkReexportsHook ];
installPhase = ''
mkdir -p $out/include/mach-o
cp \
${MacOSX-SDK}/usr/include/libunwind.h \
${MacOSX-SDK}/usr/include/unwind.h \
$out/include
cp \
${MacOSX-SDK}/usr/include/mach-o/compact_unwind_encoding.h \
$out/include/mach-o
'';
}