{
  inputs = {
    nixpkgs.url = "nixpkgs";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    {
      nixpkgs,
      rust-overlay,
      ...
    }:
    let
      overlays = [ (import rust-overlay) ];
      forAllSystems =
        f:
        builtins.mapAttrs (
          system: packages:
          let
            pkgs = import nixpkgs {
              inherit system overlays;
            };
          in
          f pkgs
        ) nixpkgs.legacyPackages;
    in
    {
      devShells = forAllSystems (
        pkgs: {
          default = pkgs.mkShell {
            shellHook = ''
              export DATABASE_URL=sqlite://art.db?mode=rwc
            '';
            packages = with pkgs; [
              # Rust toolchain
              (rust-bin.fromRustupToolchainFile ./rust-toolchain.toml)
              # LSP
              rust-analyzer
              clippy
              tombi
              openssl
              postgresql
              pkg-config
              diesel-cli
              gcc
            ];
          };
        }
      );
    };
}