diff --git a/build_library/catalyst_default_stage4.sh b/build_library/catalyst_default_stage4.sh
index e2b540a6d2..a1a3be9f13 100644
--- a/build_library/catalyst_default_stage4.sh
+++ b/build_library/catalyst_default_stage4.sh
@@ -4,3 +4,6 @@ source /tmp/chroot-functions.sh
 
 echo "Double checking everything is fresh and happy."
 run_merge -uDN --with-bdeps=y world
+
+echo "Setting the default Python interpreter to Python 2."
+eselect python set python2.7