diff --git a/pkgs/development/libraries/qt-6/modules/qtmultimedia/default.nix b/pkgs/development/libraries/qt-6/modules/qtmultimedia/default.nix
index 0b29cd3b5e4e..104bfb752531 100644
--- a/pkgs/development/libraries/qt-6/modules/qtmultimedia/default.nix
+++ b/pkgs/development/libraries/qt-6/modules/qtmultimedia/default.nix
@@ -72,6 +72,8 @@ qtModule {
     "-DQt6ShaderToolsTools_DIR=${pkgsBuildBuild.qt6.qtshadertools}/lib/cmake/Qt6ShaderToolsTools"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-include AudioToolbox/AudioToolbox.h";
-  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework AudioToolbox";
+  env = {
+    NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-include AudioToolbox/AudioToolbox.h";
+    NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework AudioToolbox";
+  };
 }