diff --git a/common.nix b/common.nix
index 270dec6..37a4191 100644
--- a/common.nix
+++ b/common.nix
@@ -109,9 +109,6 @@ in
     LC_TIME = "de_DE.UTF-8";
   };
 
-  # ensure we build all needed locales
-  i18n.supportedLocales = ["en_US.UTF-8/UTF-8" "de_DE.UTF-8/UTF-8"];
-
   # ensure we see the journal on TTY12
   services.journald.console = "/dev/tty12";
 
diff --git a/projects/kde6/kdesrc-buildrc b/projects/kde6/kdesrc-buildrc
index ab14b38..bc5856f 100644
--- a/projects/kde6/kdesrc-buildrc
+++ b/projects/kde6/kdesrc-buildrc
@@ -3,7 +3,7 @@ global
     branch-group kf6-qt6
 
     # we want .kateproject files with ninja
-    cmake-options -G "Kate - Ninja" -DBUILD_WITH_QT6=ON -DQT_MAJOR_VERSION=6 -DPHONON_BUILD_QT5=OFF
+    cmake-options -G "Kate - Ninja" -DBUILD_WITH_QT6=ON -DQT_MAJOR_VERSION=6 -DPHONON_BUILD_QT5=OFF -DBUILD_QT5=OFF
 
     # Restrict make and ninja to using no more than 8 separate compile jobs even
     # when more CPU is available, to avoid running out of memory