buildRustPackage: fix erroneous hard-coded source path #81203
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When using the new cargo fetcher dependencies are validated against the
lockfile in the source project. Unfortunately the code that does the
validation assumes that the source of the package is in the
source
directory, which it doesn't have to be. This breaks any package that
keeps its source in another directory.
The fix is to use
$sourceRoot
instead ofsource
.This affects #79975, since some crates won't be able to use
buildRustPackage
until this patch is merged.Motivation for this change
Failure to build rust crates using the new cargo fetcher.
Things done
sandbox
innix.conf
on non-NixOS linux)nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
./result/bin/
)nix path-info -S
before and after)