ELPA importer supports MELPA[1] currently. But MELPA is a rolling archive, which does not persist any old version tarball of package, and harmful for reproducible build.
It's still useful for Guix packager to import package from MELPA to draft a sketch of Emacs package, but it's not a reliable download service. We may better warn user don't submit package which download url belongs to MELPA. Maybe emit warning while executing `guix import elpa -a melpa XXX`, or writing this rule to manual. [1]: the stable archive is "MELPA stable", I use term "MELPA" to refer to the unstable one. -- Retrieve my PGP public key: https://meta.sr.ht/~citreu.pgp Zihao
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