environment --container not working after upgrading Ubuntu

[Ben Woodcroft]

Hi,

I upgraded to the just-released Ubuntu Xenial yesterday, seems nice and 
snappy. The only issue I've had with it so far is that 'guix environment 
--container' run from a git checkout doesn't work. There's no error 
given, it simply exits:

$ ./pre-inst-env guix environment --container coreutils
[..]
$ echo $?
1

Any ideas on debugging this? I tried 'make clean; make'. My daemon is a 
little out of date, but it was working before the upgrade.
Thanks,
ben