diff --git a/admin/nt/dist-build/build-zips.sh b/admin/nt/dist-build/build-zips.sh
index dc6f9dd2ca1..ec41ec8c46a 100755
--- a/admin/nt/dist-build/build-zips.sh
+++ b/admin/nt/dist-build/build-zips.sh
@@ -61,7 +61,7 @@ function build_zip {
             CFLAGS="-O2 -static -g3"
     fi
 
-    make -j 8 install \
+    make -j 2 install \
          prefix=$HOME/emacs-build/install/emacs-$VERSION/$ARCH
     cd $HOME/emacs-build/install/emacs-$VERSION/$ARCH
     cp $HOME/emacs-build/deps/libXpm/$ARCH/libXpm-noX4.dll bin