diff --git a/pkgs/applications/networking/sniffers/wireshark/default.nix b/pkgs/applications/networking/sniffers/wireshark/default.nix
index 7c17fb715a7..f91c0de9c8d 100644
--- a/pkgs/applications/networking/sniffers/wireshark/default.nix
+++ b/pkgs/applications/networking/sniffers/wireshark/default.nix
@@ -23,7 +23,10 @@ in stdenv.mkDerivation {
     sha256 = "0bpiby916k3k8bm7q8b1dflva6zs0a4ircskrck0d538dfcrb50q";
   };
 
-  cmakeFlags = optional withGtk "-DBUILD_wireshark_gtk=TRUE -DBUILD_wireshark=OFF";
+  cmakeFlags = [
+    "-DBUILD_wireshark_gtk=${if withGtk then "ON" else "OFF"}"
+    "-DBUILD_wireshark=${if withQt then "ON" else "OFF"}"
+  ];
 
   nativeBuildInputs = [
     bison cmake extra-cmake-modules flex pkgconfig