Edouard,

On Saturday, June 3, 2023 11:13:25 AM MST you wrote:
> Of course most packages are nicely coded, and grep usually find the
> answer. Nevertheless, the only way to solve this for all packages would
> be to install all packages and grep the store... i.e. run all programs
> to completion and look at the output.


Debian solves this problem by doing exactly that, and then making the output searchable 
as a web service:


https://www.debian.org/distrib/packages[1]

In my opinion, this would be a really nice addition to https://packages.guix.gnu.org/[2].

-- 
Soren Stoutner
soren@stoutner.com

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[1] https://www.debian.org/distrib/packages
[2] https://packages.guix.gnu.org/