diff --git a/pkgs/applications/display-managers/sddm/default.nix b/pkgs/applications/display-managers/sddm/default.nix
index e4f68d786f4..83e2e0018c1 100644
--- a/pkgs/applications/display-managers/sddm/default.nix
+++ b/pkgs/applications/display-managers/sddm/default.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ lndir makeQtWrapper ];
   buildInputs = [ unwrapped ] ++ themes;
-  inherit themes;
+  themes = map (pkg: pkg.out or pkg) themes;
   inherit unwrapped;
 
   installPhase = ''