diff --git a/Makefile b/Makefile
index f6fc9e2896..cf8714fd67 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ CELERY_SCHEDULE_FILE ?= /celerybeat-schedule
 
 # Python packages to install only from source (not from binary wheels)
 # Comma separated list
-SRC_ONLY_PKGS ?= cffi,pycparser,psycopg2
+SRC_ONLY_PKGS ?= cffi,pycparser,psycopg2,twilio
 
 # Determine appropriate shasum command
 UNAME_S := $(shell uname -s)