diff --git a/pkgs/development/tools/xcbuild/setup-hook.sh b/pkgs/development/tools/xcbuild/setup-hook.sh
index 4a0f74b0e6df..72ffb7b128c5 100644
--- a/pkgs/development/tools/xcbuild/setup-hook.sh
+++ b/pkgs/development/tools/xcbuild/setup-hook.sh
@@ -3,7 +3,7 @@ xcbuildPhase() {
 
     echo "running xcodebuild"
 
-    xcodebuild OTHER_CFLAGS="$NIX_CFLAGS_COMPILE"
+    xcodebuild
 
     runHook postConfigure
 }
diff --git a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/xcode.nix b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/xcode.nix
index f9e8207d8bfa..e5600f3962da 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/xcode.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/xcode.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
   '';
 
   buildInputs = [ xcbuild libcxx ];
-  #NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin "-I${libcxx}/include/c++/v1";
+  NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin "-I${libcxx}/include/c++/v1";
 
   meta = {
     platforms = stdenv.lib.platforms.darwin;