Training derivation to build skim util tool.

skim.nix

with import <nixpkgs> {};

rustPlatform.buildRustPackage rec {
  pname = "my-skim";
  version = "1.2.3";

  src = fetchFromGitHub {
    owner = "lotabout";
    repo = "skim";
    rev = "v0.9.4";
    sha256 = "sha256-+8ZLI7WbsixqnEW1AC9e1bI4FOT9ab6RyEgeV2VYeIo=";
  };

  cargoSha256 = "sha256-uRgx0bSd5tUTAj0lv6HjpW+QViHPHb2rXWSVGPPSWtE=";
}