Add buildInputs but for cargo-package-deps not the toplevel derivation.

[zmrocze]

I know my crate doesn't build because of system dependencies in the rust dependency for my project.

It does build if I install those system dependencies, that is:

nix-shell -p alsa-lib pkg-config -c "cargo build"

succeeds, but cargo build itself doesn't.

So now I'd like to build with crane. But adding buildInputs = [alsa-lib pkg-config] to the arguments to buildDepsOnly doesn't do the trick. I think because it only overrides deps in the toplevel built derivation.

[zmrocze]

i think i just need to specify it as nativeBuildInputs?

[ipetkov]

Hi @zmrocze ! Usually pkg-config needs to go in nativeBuildInputs and everything else usually goes in buildInputs in case that helps get your build to work.

As for doing a "vanilla" cargo build you will likely need to enter a devshell (e.g. via nix develop) to pull those dependencies in. Take a look at the sqlx example here as a quick starting point on how to set up nativeBuildInputs/buildInputs and a devshell. Hope this helps!