channel = make_channel(config[section])
if 'channel_url' in config[section]:
pin_channel(v, channel)
+ config[section]['name'] = channel.release_name
config[section]['tarball_url'] = channel.table['nixexprs.tar.xz'].absolute_url
config[section]['tarball_sha256'] = channel.table['nixexprs.tar.xz'].digest
else: