diff --git a/lib/py/Makefile.am b/lib/py/Makefile.am
old mode 100644
new mode 100755
index 4a1df57..e33bf13
--- a/lib/py/Makefile.am
+++ b/lib/py/Makefile.am
@@ -16,7 +16,7 @@
 # specific language governing permissions and limitations
 # under the License.
 #
-
+.NOTPARALLEL:
 DESTDIR ?= /
 EXTRA_DIST = setup.py setup.cfg src compat