How do I get tools into dependencies build scripts?

Hi,
I am using crates_universe, but some dependencies fail (such as `rdkafka`) because they need more utils / system libraries than what is available by default in the toolchains.

What can I do to prepare a general environment where build scripts would run?

I saw tool/data here: https://bazelbuild.github.io/rules_rust/cargo.html#cargo_build_script-tools

But how to add tools / data to **all build scripts in the Cargo dependency tree?**

To elaborate, the ideal for me would be to be able to add nixpkgs, if that's possible.

Thanks a lot for any advice :-)
Lukáš