diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index c0822e478f3..b98ff47984f 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -174,9 +174,9 @@ buildStdenv.mkDerivation ({
   ++ lib.optional  gtk3Support gtk3
   ++ lib.optional  gssSupport kerberos
   ++ lib.optional  ltoSupport llvmPackages.libunwind
-  ++ lib.optionals waylandSupport [ libxkbcommon ]
-  ++ lib.optionals pipewireSupport [ pipewire ]
-  ++ lib.optionals (lib.versionAtLeast ffversion "82") [ gnum4 ]
+  ++ lib.optional  waylandSupport libxkbcommon
+  ++ lib.optional  pipewireSupport pipewire
+  ++ lib.optional  (lib.versionAtLeast ffversion "82") gnum4
   ++ lib.optionals buildStdenv.isDarwin [ CoreMedia ExceptionHandling Kerberos
                                           AVFoundation MediaToolbox CoreLocation
                                           Foundation libobjc AddressBook cups ];