build: add a mention why we still use nix-gitignore

diff --git a/flake.nix b/flake.nix
index e54847737943a0a6ebc323d8375282e2c73040b0..0fda72eb3710ee81c746ca10562a49342175f343 100644 (file)
--- a/flake.nix
+++ b/flake.nix
@@ -11,6 +11,7 @@
       {
         defaultPackage = pkgs.stdenv.mkDerivation rec {
           name = "lldpd";
+          # We should be able to just use ./., but we have libevent as a submodule.
           src = pkgs.nix-gitignore.gitignoreSource [ ] ./.;
           configureFlags = [
             "--localstatedir=/var"