{
  description = "Julia2Nix development environment";

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

    devshell.url = "github:numtide/devshell";
    devshell.inputs.nixpkgs.follows = "nixpkgs";

    julia2nix.url = "github:JuliaCN/Julia2Nix.jl";
  };

  outputs = inputs @ {
    self,
    julia2nix,
    ...
  }:
    (
      inputs.flake-utils.lib.eachDefaultSystem
      (system: let
        pkgs = inputs.nixpkgs.legacyPackages.${system}.appendOverlays [
          inputs.devshell.overlays.default
          self.overlays.default
        ];
        julia-wrapped = inputs.julia2nix.lib.${system}.julia-wrapped {
          # package = pkgs.julia_17-bin;
          package = julia2nix.packages.${system}.julia_18-bin;
          enable = {
            # only x86_64-linux is supported
            GR = true;
            python =
              pkgs.python3.buildEnv.override
              {
                extraLibs = with pkgs.python3Packages; [xlrd matplotlib pyqt5];
                # ignoreCollisions = true;
              };
          };
        };

        # run this command in your project: nix run github:JuliaCN/Julia2Nix.jl#packages.x86_64-linux.julia2nix
        # we need to generate the julia2nix.toml first
        project = inputs.julia2nix.lib.${system}.buildProject {
          src = ./.;
          name = "Reservoir Engineering";
          package = julia-wrapped;
        };
      in {
        packages = {
          # make sure you have generated the julia2nix.toml
          default = project;
        };
        devShells.default = pkgs.devshell.mkShell {
          imports = [
            # you can keep either one of them devshellProfiles.packages or julia-wrapped
            # inputs.julia2nix.${pkgs.system}.julia2nix.devshellProfiles.packages

            # add dev-tools in your devshell
            inputs.julia2nix.${pkgs.system}.julia2nix.devshellProfiles.dev

            # add nightly julia
            # inputs.julia2nix.${pkgs.system}.julia2nix.devshellProfiles.nightly
          ];
          commands = [
            {
              package = julia-wrapped;
              help = julia2nix.packages.${pkgs.system}.julia_18-bin.meta.description;
            }

            {
              name = "push-looping";
              command = "${pkgs.git}/bin/git subtree push --prefix=src/Looping/ looping main";
              help = "Pushes the `Looping` subtree to the upstream repo.";
            }
          ];
        };
      })
    )
    // {
      overlays.default = final: prev: {};
    };
}