diff --git a/scripts/setup-ubuntu.sh b/scripts/setup-ubuntu.sh
index 15c32c895a3e..628bb0bec71d 100755
--- a/scripts/setup-ubuntu.sh
+++ b/scripts/setup-ubuntu.sh
@@ -190,7 +190,7 @@ function install_stemmer {
   (
     cd stemmer
     git apply $SCRIPTDIR/../CMake/resolve_dependency_modules/libstemmer/Makefile.patch
-    make "-j$(nproc)"
+    make "-j$(NPROC)"
     make install
   )
 }