diff --git a/mame-module.yml b/mame-module.yml
index 72b5c3c..f23acd5 100644
--- a/mame-module.yml
+++ b/mame-module.yml
@@ -7,7 +7,7 @@ modules:
       strip: true
     build-commands:
       - make
-          -j echo $(nproc)
+          -j ${FLATPAK_BUILDER_N_JOBS}
           CFLAGS+=-Wno-error=restrict
           USE_QTDEBUG=0 
           USE_WAYLAND=1