{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

    naersk = {
      url = "github:nix-community/naersk/master";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nixpkgs-mozilla = {
      url = "github:mozilla/nixpkgs-mozilla";
      flake = false;
    };

    utils.url = "github:numtide/flake-utils";
  };

  outputs = {
    self,
    nixpkgs,
    nixpkgs-mozilla,
    utils,
    naersk,
  }:
    utils.lib.eachDefaultSystem (system: let
      pkgs = (import nixpkgs) {
        inherit system;

        overlays = [
          (import nixpkgs-mozilla)
        ];
      };

      toolchain =
        (pkgs.rustChannelOf {
          rustToolchain = ./rust-toolchain.toml;
          sha256 = "sha256-rLP8+fTxnPHoR96ZJiCa/5Ans1OojI7MLsmSqR2ip8o=";
        })
        .rust;

      naersk' = pkgs.callPackage naersk {
        cargo = toolchain;
        rustc = toolchain;
      };
    in {
      packages.default = naersk'.buildPackage ./.;
      formatter = nixpkgs.legacyPackages.${system}.alejandra;
      checks = {
        inherit (self.packages.${system}) default;
        # TODO: clippy
      };
      devShell = with pkgs;
        mkShell {
          buildInputs = [toolchain];
          RUST_SRC_PATH = rustPlatform.rustLibSrc;
        };
    });
}