{
  self',
  packageToml,
  rust-bin,
  mkShell,
}: let
  msrv = packageToml.rust-version;

  mkDevShell = rust:
    mkShell {
      inputsFrom = [
        (self'.packages.default.override {
          rust = rust.override {
            extensions = ["rust-src"];
          };
        })
      ];

      env.RUST_BACKTRACE = 1;
    };
in {
  default = mkDevShell rust-bin.stable.latest.default;
  msrv = mkDevShell rust-bin.stable.${msrv}.default;
}