diff --git a/pkgs/os-specific/darwin/apple-sdk-11.0/libSystem.nix b/pkgs/os-specific/darwin/apple-sdk-11.0/libSystem.nix
index f04b964f755f4..0297f8897f12d 100644
--- a/pkgs/os-specific/darwin/apple-sdk-11.0/libSystem.nix
+++ b/pkgs/os-specific/darwin/apple-sdk-11.0/libSystem.nix
@@ -39,6 +39,7 @@ stdenvNoCC.mkDerivation {
 
     cp -d \
       ${MacOSX-SDK}/usr/include/*.h \
+      ${MacOSX-SDK}/usr/include/*.modulemap \
       $out/include
 
     rm $out/include/tk*.h $out/include/tcl*.h