load flake in repl

flake.nix

{
  description = "A very basic flake";
  inputs = {
    nixgl.url = "github:guibou/nixGL";
    nixpkgs.url = "nixpkgs/release-22.11";
  };
  outputs = { nixgl, nixpkgs, ... }:
    let
      glpkgs = import nixpkgs {
        system = "x86_64-linux";
        allowUnfree = true;
        overlays = [ nixgl.overlay ];
      };
    in
    {
      packages = {
        inherit glpkgs;
      };
    };
}

nix repl example

$ nix repl
Welcome to Nix 2.11.1. Type :? for help.

nix-repl> :lf .
Added 8 variables.

nix-repl> packages.glpkgs