Hi [explicitly CC'ing Ludo', I hope that's OK],

I don't think

  guix install $(guix build foo)

is, or is expected to be, a supported way to install packages?  Packages have more metadata attached to them than store items.  I don't think that propagation is recorded in the Nix database.  Nor do I think it should be just to support this hack.

It actually is mentioned explicitly in the manual. https://guix.gnu.org/manual/devel/en/html_node/Invoking-guix-package.html

from the link above:

Alternatively, a package can directly specify a store file name such as /gnu/store/...-guile-3.0.7, as produced by, e.g., guix build.

Sometimes packages have propagated inputs: these are dependencies that automatically get installed along with the required package (see propagated-inputs in package objects, for information about propagated inputs in package definitions).

There was an investigation yesterday at the xmpp room and that is how we discovered that the documentation has a bug. If we do not want to support it then this is just a documentation bug.

Personally i could go either way. I already updated the project documentation I have to reflect not to do this https://codeberg.org/Guix_Bechamel/collective/wiki/Updating-Packages#testing-the-package-at-runtime

MSavoritias