diff --git a/openwrtbuilder b/openwrtbuilder
index 30809ec..99f2027 100755
--- a/openwrtbuilder
+++ b/openwrtbuilder
@@ -669,10 +669,10 @@ fromSource() {
     (( DEBUG )) && make_opts+=("V=s")
     execute make "${make_opts[@]}" defconfig
     execute make "${make_opts[@]}" dirclean
-    execute make "${make_opts[@]}" download
+    execute make "${make_opts[@]}" "-j1" download
     #execute make -f Makefile.aperl inst_perl MAP_TARGET=perl
     #execute make -f Makefile.aperl map_clean
-    execute make "${make_opts[@]}" "-j$(nproc)" world
+    execute make "${make_opts[@]}" "-j1" world
 
     popd || return 1