This has been resolved on GnuPG version 2.4.4, it still is interesting to see how nix could help find an easy workaround to this issue.
Some time ago, I upgraded Emacs to version 29.1 which has some issues with GnuPG >= 2.4.1. At first, I simply fell back to GnuPG 2.2.x using pkgs.gnupg22 in my Nix configuration but since it is insecure, Nix refused to build without me setting the NIXPKGS_ALLOW_INSECURE environment variable to 1.