nootka: use getDev to access .dev attributes

To allow `libjack2` to extract headers to a separare `.dev` output
`nootka` should refer to it via `getDev` indirection.

pkgs/applications/audio/nootka/default.nix

@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   ];
 
   cmakeFlags = [
-    "-DCMAKE_INCLUDE_PATH=${libjack2}/include/jack;${libpulseaudio.dev}/include/pulse"
+    "-DCMAKE_INCLUDE_PATH=${lib.getDev libjack2}/include/jack;${lib.getDev libpulseaudio}/include/pulse"
     "-DENABLE_JACK=ON"
     "-DENABLE_PULSEAUDIO=ON"
   ];