diff --git a/mkosi.extra/etc/xdg/kde-builder.yaml b/mkosi.extra/etc/xdg/kde-builder.yaml
index 9c8bad5..e9a91cd 100644
--- a/mkosi.extra/etc/xdg/kde-builder.yaml
+++ b/mkosi.extra/etc/xdg/kde-builder.yaml
@@ -137,5 +137,9 @@ override discover:
 override plasma-desktop:
     cmake-options: -DBUILD_KCM_TOUCHPAD_X11=OFF -DBUILD_KCM_MOUSE_X11=OFF
 
+# Different for KDE Linux: we don't include the X11 session.
+override plasma-workspace:
+    cmake-options: -DWITH_X11_SESSION=OFF
+
 override plasma-login-manager:
     cmake-options: -DPAM_OS_CONFIGURATION=kde-linux