diff --git a/files/apts/horizon b/files/apts/horizon
index 03df3cba97..5d06928c7b 100644
--- a/files/apts/horizon
+++ b/files/apts/horizon
@@ -17,3 +17,4 @@ python-mox
 python-coverage
 python-cherrypy3 # why?
 python-migrate
+libpcre3-dev  # pyScss
diff --git a/files/rpms/horizon b/files/rpms/horizon
index fe3a2f40c0..7add23a549 100644
--- a/files/rpms/horizon
+++ b/files/rpms/horizon
@@ -19,3 +19,4 @@ python-sphinx
 python-sqlalchemy
 python-webob
 pyxattr
+pcre-devel  # pyScss