{
  description = "The world's your oyster!";

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

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

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

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

        toolchain = with fenix.packages.${system};
          combine [
            stable.toolchain
            targets.x86_64-unknown-linux-musl.stable.rust-std
          ];

        naersk' = pkgs.callPackage naersk {
          cargo = toolchain;
          rustc = toolchain;
        };
      in {
        defaultPackage = naersk'.buildPackage {
          name = "oyster";
          src = ./.;
        };

        devShell = pkgs.mkShell {
          nativeBuildInputs = with pkgs; [
            cargo-insta
            toolchain
          ];
        };
      }
    );
}