From aebec793407b257ee7914cd78ea4e513e870852e Mon Sep 17 00:00:00 2001
From: Ben Allen <bsallen@alcf.anl.gov>
Date: Sun, 1 Oct 2017 17:03:43 +0000
Subject: [PATCH] Set config.os_packages to an empty set instead of None

---
 autospec/config.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/autospec/config.py b/autospec/config.py
index 798a964..220663b 100644
--- a/autospec/config.py
+++ b/autospec/config.py
@@ -53,7 +53,7 @@ autoreconf = False
 license_fetch = None
 license_show = None
 git_uri = None
-os_packages = None
+os_packages = set()
 config_file = None
 old_version = None
 old_patches = list()