guix environment ad-hoc manifests

[Reza Alizadeh Majd]

Hi Guix, 

working with guix environments, we can pass list of packages, using a
manifest file. we also can use --ad-hoc switch for additional packages
we need to add to the prepared environment.

it would also be great to be able to pass list of ad-hoc packages,
using a manifest file, something like --ad-hoc-manifest switch. or
maybe there is such option already available that I missed. 

Regards, 
Reza

-- 
Reza Alizadeh Majd
PantherX Team
https://www.pantherx.org/