Subject: bug#31302: `guix import json` doesn't handle inputs with the form 'package:output'

From: <[email-masked]>
Date: Sat, 28 Apr 2018 17:28:21 +0100 (BST)

For example, if you specify 'glib:bin' as an input, it will add only 'glib' as an input. (It's not recognising a specified output of a package recipe that produces multiple outputs.)