diff --git a/pkgs/development/libraries/kde-frameworks/kwindowsystem/default.nix b/pkgs/development/libraries/kde-frameworks/kwindowsystem/default.nix
index ba43a5668a7c..fa9078eeb205 100644
--- a/pkgs/development/libraries/kde-frameworks/kwindowsystem/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kwindowsystem/default.nix
@@ -17,4 +17,5 @@ mkDerivation {
   preConfigure = ''
     NIX_CFLAGS_COMPILE+=" -DNIXPKGS_QT_PLUGIN_PATH=\"''${!outputBin}/$qtPluginPrefix\""
   '';
+  outputs = [ "out" "dev" ];
 }
diff --git a/pkgs/development/libraries/kde-frameworks/kwindowsystem/platform-plugins-path.patch b/pkgs/development/libraries/kde-frameworks/kwindowsystem/platform-plugins-path.patch
index ed24897d342a..ae0da37922e9 100644
--- a/pkgs/development/libraries/kde-frameworks/kwindowsystem/platform-plugins-path.patch
+++ b/pkgs/development/libraries/kde-frameworks/kwindowsystem/platform-plugins-path.patch
@@ -14,7 +14,7 @@ Index: kwindowsystem-5.32.0/src/pluginwrapper.cpp
 -        foreach (const QString &entry, pluginDir.entryList(QDir::Files | QDir::NoDotAndDotDot)) {
 -            ret << pluginDir.absoluteFilePath(entry);
 -        }
-+    QDir pluginDir(QStringLiteral(NIXPKGS_QT_PLUGIN_PATH) + QLatin1Literal("/kf5/org.kde.kwindowsystem.platforms"));
++    QDir pluginDir(QLatin1String(NIXPKGS_QT_PLUGIN_PATH) + QLatin1Literal("/kf5/org.kde.kwindowsystem.platforms"));
 +    foreach (const QString &entry, pluginDir.entryList(QDir::Files | QDir::NoDotAndDotDot)) {
 +        ret << pluginDir.absoluteFilePath(entry);
      }