Sorry for late response.

On Tue, Feb 03, 2015 at 09:57:04PM +0100, Ludovic Courtès wrote:
>sleep_walker@suse.cz skribis:
>
>> Package: guix
>> Version: 0.8.1
>>
>> When I invoke `guix gc -d /path', success of the command depends whether /path ends with slash or not:
>>
>> $ guix gc -d /gnu/store/mgqk0kv5jckrd7l5cwj68fp7cz2l4qqj-luajit-2.0.3/
>> guix gc: error: build failed: path `/gnu/store/mgqk0kv5jckrd7l5cwj68fp7cz2l4qqj-luajit-2.0.3/' is not in the Nix store
>>
>> $ guix gc -d /gnu/store/mgqk0kv5jckrd7l5cwj68fp7cz2l4qqj-luajit-2.0.3
>> finding garbage collector roots...
>> cannot read potential root `/var/guix/manifests'
>> deleting `/gnu/store/73b760g2nr9syhznydgly8r7vl2k9z11-profile'
>> deleting `/gnu/store/mgqk0kv5jckrd7l5cwj68fp7cz2l4qqj-luajit-2.0.3'
>> deleting `/gnu/store/trash'
>> deleting unused links...
>> note: currently hard linking saves 247.60 MiB
>>
>>
>> * with the misleading error message it is usability bug
>> * it should be safe always try to remove slash from the end
>> * other commands may be affected too and the behaviour should be consistent for all commands
>
>What behavior do you think would be appropriate when running, say:
>
>  guix gc -d /gnu/store/mgqk0kv5jckrd7l5cwj68fp7cz2l4qqj-luajit-2.0.3/bin/lua
>
>Should it be equivalent to:
>
>  guix gc -d /gnu/store/mgqk0kv5jckrd7l5cwj68fp7cz2l4qqj-luajit-2.0.3
>
>I would think so, but I’d like to have feedback.

I think so as well.

>
>Thanks,
>Ludo’.
>
>PS: Make sure to use bug-guix@gnu.org for bug reports.

Sorry about that, I'm still getting used to GNU's bugtracker...