diff --git a/projects/kde/kdesrc-buildrc b/projects/kde/kdesrc-buildrc
index 1c32a20..040ceac 100644
--- a/projects/kde/kdesrc-buildrc
+++ b/projects/kde/kdesrc-buildrc
@@ -3,7 +3,12 @@ global
     branch-group kf6-qt6
 
     # we want ninja, turn off some Qt 5 things to have less dependencies
-    cmake-options -G "Ninja" -DBUILD_WITH_QT6=ON -DQT_MAJOR_VERSION=6 -DPHONON_BUILD_QT5=OFF -DBUILD_QT5=OFF -DBUILD_PYTHON_BINDINGS=OFF
+    cmake-options -G "Ninja" -DBUILD_WITH_QT6=ON -DQT_MAJOR_VERSION=6 -DPHONON_BUILD_QT5=OFF -DBUILD_QT5=OFF -DBUILD_PYTHON_BINDINGS=OFF -DCMAKE_AUTOGEN_PARALLEL=8
+
+    # 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
+    make-options -j8 NINJAFLAGS=-j8
+    ninja-options -j8
 
     # clangd tooling
     compile-commands-export yes