[Request] rust-nightly toolchain

[nyabinary]

Link to the package upstream website/repository

rust-nightly

Utility this package has for you

Rust toolchain without using a different flake/overlay (and with purity)

Do you consider the package(s) to be useful for every Chaotic-Nyx user?

YES!

Do you consider the package to be useful for feature testing/preview?

• [X] Yes

Are you sure the package isn't available upstream already?

• [X] Yes

Does the package's license allow redistributing it?

YES!

Have you searched the issues to ensure this request is unique?

• [X] YES!

Have you read the README to ensure this package is not banned?

• [X] YES!

More information

Could be based on this? https://github.com/nix-community/fenix