This is awesome. I think Guix really lacks a very detailed document on packaging. Every patch I wrote is vastly based on apriority assumptions and lots of try and fails.

در 28 ژوئن 2021 21:30:46 (UTC)، Maxime Devos <maximedevos@telenet.be> نوشت:
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _ (invoke "pytest"))))))

I'm a bit late, as this has already been merged,
but this should have been something like:

+         (replace 'check
+           (lambda* (#:key tests? #:allow-other-keys)
+             (when tests?
+               (invoke "pytest")))))))

That way, tests can be disabled with "--without-tests".
Try "./pre-inst-env guix build pytest --without-tests=pytests".
Respecting #:tests? can also be important for cross-compilation.

Could you send a follow-up patch, or could someone directly
commit such a change?

Greetings,
Maxime.