diff --git a/sau/gentoo.py b/sau/gentoo.py
index da73c68..53eb05f 100644
--- a/sau/gentoo.py
+++ b/sau/gentoo.py
@@ -285,7 +285,7 @@ def pkg_upgrade():
         elif go_packages:
             dependencies = []
             for package in go_packages:
-                dependencies.append(get_dependencies(package))
+                dependencies.extend(get_dependencies(package))
             dependencies = set(dependencies)
             upgraded = set(rebuild_packages.keys())
             not_upgraded = dependencies-upgraded