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#guix has a new recursive importer for #rust #crates, written by Martin Becze and improved by me. It now, when searching dependencies, prefers an existing package satisfying semver requirement over importing the highest version create. This saves adding a lot of new packages. As an example: When importing sequoia-openpgp@0.20.0 this only imports 19 crates now, compared to 96 using the former method.
Also package names are now trimmed to the first non-zero part - resulting in the semver.