graphile_worker 0.8.5

High performance Rust/PostgreSQL job queue (also suitable for getting jobs generated by PostgreSQL triggers/functions out into a different work queue)
Documentation 
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{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-parts.url = "github:hercules-ci/flake-parts";
    systems.url = "github:nix-systems/default";
  };

  outputs = inputs:
    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
      systems = import inputs.systems;
      perSystem = { config, self', pkgs, lib, system, ... }:
        let
          cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
          nonRustDeps = with pkgs; [
            libiconv
            pkg-config
            openssl
          ];
          rust-toolchain = pkgs.symlinkJoin {
            name = "rust-toolchain";
            paths = [ pkgs.rustc pkgs.cargo pkgs.cargo-watch pkgs.rust-analyzer pkgs.rustPlatform.rustcSrc ];
          };
        in
        {
          # Rust package
          packages.default = pkgs.rustPlatform.buildRustPackage {
            inherit (cargoToml.package) name version;
            src = ./.;
            cargoLock.lockFile = ./Cargo.lock;
          };

          # Rust dev environment
          devShells.default = pkgs.mkShell {
            shellHook = ''
              export RUST_SRC_PATH=${pkgs.rustPlatform.rustLibSrc}
            '';
            buildInputs = nonRustDeps;
            nativeBuildInputs = with pkgs; [
              just
              rust-toolchain
            ];
            RUST_BACKTRACE = 1;
          };
        };
    };
}