In reply to @gabyx:matrix.org
Wouldn't also be helpful, if one could have some yaml annotation in the PR decscription
which could be taken up in a Github job which could then do some special attribute builds?
Just a simple stupid Nix VM (Github Job) which builds the requested attribute on requested arch (optional) etc.
like ofBorg does but in Github Actions (note: I hate Github Actions to the core..., the worst...)