Merge branch 'staging'

Darwin isn't in a perfect state, in particular its bootstrap tools won't
build which will block nixpkgs channel. But on the whole it seems
acceptable.

pkgs/development/tools/analysis/clang-analyzer/default.nix

@@ -11,7 +11,8 @@ stdenv.mkDerivation rec {
 
   patches = [ ./0001-Fix-scan-build-to-use-NIX_CFLAGS_COMPILE.patch ];
   buildInputs = [ clang llvmPackages.clang perl makeWrapper ];
-  buildPhase = "true";
+
+  dontBuild = true;
 
   installPhase = ''
     mkdir -p $out/bin $out/libexec