diff --git a/pkgs/os-specific/darwin/apple-source-releases/libclosure/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libclosure/default.nix
index ac33a24a8b4e..d42a288208c5 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libclosure/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libclosure/default.nix
@@ -5,4 +5,9 @@ appleDerivation {
     mkdir -p $out/include
     cp *.h $out/include/
   '';
+
+  appleHeaders = ''
+    Block.h
+    Block_private.h
+  '';
 }