Describe the bug
The "new" thunderbird@78 has native support for gpg now.

To Reproduce
Steps to reproduce the behavior:

1. install thunderbird@78
2. configure the gpg key manually
3. the mail encryption doesn't work

Expected behavior
It should support gpg smartcards or at least have an option to install all needed dependencies (gpgme).

Notify maintainers
@eelco
@lovesegfault
@pierron
@vcunat

Metadata
Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

• system: "x86_64-linux"
• host os: Linux 5.8.10, NixOS, 21.03pre244045.1179840f9a8 (Okapi)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.3.7
• channels(root): "nixos-21.03pre244045.1179840f9a8"
• channels(thomas): "nixpkgs-21.03pre243895.72b9660dc18"
• nixpkgs: /home/thomas/.nix-defexpr/channels/nixpkgs