What's the desired avenue for discussing and submitting problems found within rustPlatform? I have found a few issues when dealing with private registries. I can provide more complete details but I'll share a short summary for now.

1. The fetchCrate function in import-cargo-lock.nix assumes that all registry platforms follow the same URL path schema. Sadly not all do and some don't even expose tar.gz files. I have a fix that changes how the function works so users must define the url path, naming scheme, etc.
2. The mkCrate function generally works for private registries, but it will not work for git dependencies that have a dependency in a private registry. In the beginning of the runCommand instructions are two calls to cargo metadata that are pointed at the source Cargo.toml but will not find the .cargo/config.toml and therefore cannot find information about the registry-index.

What's the desired avenue for discussing and submitting problems/fixes found within rustPlatform? I have found a few issues when dealing with private registries. I can provide more complete details but I'll share a short summary for now.

1. The fetchCrate function in import-cargo-lock.nix assumes that all registry platforms follow the same URL path schema. Sadly not all do and some don't even expose tar.gz files. I have a fix that changes how the function works so users must define the url path, naming scheme, etc.
2. The mkCrate function generally works for private registries, but it will not work for git dependencies that have a dependency in a private registry. In the beginning of the runCommand instructions are two calls to cargo metadata that are pointed at the source Cargo.toml but will not find the .cargo/config.toml and therefore cannot find information about the registry-index.

IMO opening an nixpkgs issue with some details is fine

btw I had a TODO for fetchCargoVendor to add a way to deduce the download URL schema from the registry url.
I think there is some dl key that can be fetched through some API.

(but first we have to figure out how under what directory should we store files fetched from non-standard registries)