Modestas had a few very good ideas on how to improve the patch I've
introduced with a previous commit. This patch incorporates them.
Signed-off-by: Kai Wasserbäch <debian@carbon-project.org>
Actually a very small change: just also check if there is a specific
version requested, otherwise proceed as with the previous patch.
Signed-off-by: Kai Wasserbäch <debian@carbon-project.org>