diff --git a/pkgs/desktops/plasma-5/sddm-kcm.nix b/pkgs/desktops/plasma-5/sddm-kcm.nix
index a9f51e50a268..9e3776e8e291 100644
--- a/pkgs/desktops/plasma-5/sddm-kcm.nix
+++ b/pkgs/desktops/plasma-5/sddm-kcm.nix
@@ -1,8 +1,19 @@
-{
-  mkDerivation, lib, extra-cmake-modules, shared-mime-info,
-  libpthreadstubs, libXcursor, libXdmcp,
-  qtbase, qtquickcontrols2, qtx11extras,
-  karchive, ki18n, kio, knewstuff
+{ mkDerivation
+, lib
+, extra-cmake-modules
+, shared-mime-info
+, libpthreadstubs
+, libXcursor
+, libXdmcp
+, qtbase
+, qtquickcontrols2
+, qtx11extras
+, karchive
+, kcmutils
+, kdeclarative
+, ki18n
+, kio
+, knewstuff
 }:
 
 mkDerivation {
@@ -10,8 +21,16 @@ mkDerivation {
   meta.broken = lib.versionOlder qtbase.version "5.15.0";
   nativeBuildInputs = [ extra-cmake-modules shared-mime-info ];
   buildInputs = [
-    libpthreadstubs libXcursor libXdmcp
-    qtquickcontrols2 qtx11extras
-    karchive ki18n kio knewstuff
+    libpthreadstubs
+    libXcursor
+    libXdmcp
+    qtquickcontrols2
+    qtx11extras
+    karchive
+    kcmutils
+    kdeclarative
+    ki18n
+    kio
+    knewstuff
   ];
 }