use short package name for gentoo

chusiang · chusiang · commit 4358c71fcdd8 · 2016-11-28T03:15:58.000+08:00
diff --git a/gentoo/Dockerfile b/gentoo/Dockerfile
@@ -6,7 +6,7 @@ MAINTAINER Chu-Siang Lai <chusiang@drx.tw>
 RUN emerge --sync
 
 # Install the requires portage package and python.
-RUN emerge gcc dev-lang/python-2.7.12 dev-python/pip gentoolkit
+RUN emerge gcc python:2.7 pip gentoolkit
 
 # switch python to v2.7.
 RUn eselect python set 1
