{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = {self, nixpkgs, flake-utils, rust-overlay}:
    flake-utils.lib.eachDefaultSystem (system:
      let
        overlays = [ (import rust-overlay) ];
        pkgs = import nixpkgs {
          inherit system overlays;
        };
        
        rustToolchain = pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
        rustPlatform = pkgs.makeRustPlatform {
          cargo = rustToolchain;
          rustc = rustToolchain;
        };
        rustPackage = crate:
          let cargoToml = builtins.fromTOML (builtins.readFile ./${crate}/Cargo.toml);
          in rustPlatform.buildRustPackage {
            inherit (cargoToml.package) name version;
            src = ./.;
            cargoLock.lockFile = ./Cargo.lock;
            buildAndTestSubdir = crate;
          };
      in
      {
        devShells.default = pkgs.mkShell {
          buildInputs = [ rustToolchain ];
        };

        packages.sidebus-agent = rustPackage "sidebus-agent";
        packages.sidebus-broker = rustPackage "sidebus-broker";
      }
    );
}