Hi Maxim, Your help is much appreciated! The changes all look good, but there is one thing which is alarming me somewhat. Perhaps I am misunderstanding how the `substitutable-derivation?` function actually operates, but if I apply these patches and then run, say:
``` (use-modules (guix) (gnu) (gnu packages bash)) (define store (open-connection)) (display (substitutable-derivation? (package-derivation store bash-minimal))) ``` it prints `#f`, which seems quite contrary to what I would expect. Oddly enough, despite this, Guix still seems to fetch a substitute for `bash-minimal` from Cuirass. In this sense it doesn't cause a problem, but I don't understand why the above script prints `#f` despite Guix fetching a substitute. Hopefully this is just a misunderstanding on my part and the changes are actually completely fine. Best, Morgan
