{
  description = "PapaTutuWawa's flake configuration";

  inputs = {
    home-manager.url = "github:nix-community/home-manager/master";
    flake-utils.url = "github:numtide/flake-utils";
    #nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    nixpkgs.url = "github:nixos/nixpkgs/master";
    stable.url = "github:nixos/nixpkgs/nixos-21.05";
    emacs.url = "github:nix-community/emacs-overlay";
    nur.url = "github:nix-community/nur";
    ostylk.url = "git+https://dev.ostylk.de/NixDistro/Config";
  };

  outputs = {
    self
    , nixpkgs
    , home-manager
    , flake-utils
    , ...
  }@inputs: let
    inherit (import ./lib/flake.nix {
      inherit flake-utils;
      inherit (nixpkgs) lib;
    }) eachDefaultLinuxSystem;
    mkSystem = import ./lib/mkSystem.nix {
      inherit inputs;
      inherit (inputs) nur emacs;
      inherit (nixpkgs) lib config;
    };
  in {
    # Defines outputs that is not dependent on a specific system, i.e. overlays
    overlay = import ./packages;
    
    nixosConfigurations = {
      miku = mkSystem {
        hostConfigFile = ./hosts/miku.nix;
      };
      mashu = mkSystem {
        hostConfigFile = ./hosts/mashu.nix;
      };
      nishimiya = mkSystem {
        hostConfigFile = ./hosts/nishimiya.nix;
      };
    };
  } // eachDefaultLinuxSystem (system: {
    packages = let
      pkgs = import nixpkgs {
        inherit system;

        overlays = [
          self.overlay
        ];
      };
    in {
      # key-mapper only runs on linux
      inherit (pkgs) key-mapper;
    };
  });
}