emacs-nix/flake.nix

{
  description = "tA's emacs setup";
  inputs = {
    nixpkgs = {
      url = "github:NixOS/nixpkgs/nixos-20.09";
    };
    flake-utils = {
      url = "github:numtide/flake-utils";
    };
  };
  outputs = { self, nixpkgs, flake-utils, ... }: 
  flake-utils.lib.eachDefaultSystem (system:
    let
      pkgs = import nixpkgs {
        overlays = [ (import ./overlay.nix) ];
        inherit system;
      };
    in {
      defaultPackage = pkgs.ta.emacs;
    }) // { 
      overlay = import ./overlay.nix;
    };
}