test build

create a default.nix file in this directory

{
    buildGoModule ? null,
    lib
}:
buildGoModule rec {
    pname = "coredns";
    version = "0.0.1";

    src = ./.;
    vendorHash = lib.fakeHash;
    
    meta = with lib; {
        description = "Coredns with plugins for nixos configurations";
        homepage = "https://github.com/bia3/customCoredns";
        license = licenses.mit;
        maintainers = with maintainers; [ bia3 ];
    };
}

and ru the following

nix-build -E 'with import <nixpkgs> { }; callPackage ./default.nix { }'