anchor.diff:  , libmnl
   , libwg
   , openvpn-mullvad
  +, shadowsocks-rust
   }:
   let
     # result of running address_cache as of 02 Mar 2022
  
positive.code:         --set-default MULLVAD_RESOURCE_DIR "$out/share/mullvad"
      '';
  
    passthru = { inherit openvpn-mullvad; };
  
    meta = with lib; {
      description = "Mullvad VPN command-line client tools";
  
negative.code:     # Put distributed assets in-place -- specifically, the
      # bootstrap-address-cache is necessary; otherwise, the user will have to run
      # the `address_cache` binary and move the contents into place at
      # `/var/cache/mullvad-vpn/api-ip-address.txt` manually.
      ''
        mkdir -p $out/share/mullvad
        ln -s ${bootstrap-address-cache} $out/share/mullvad/api-ip-address.txt
      '' +
      # Files necessary for OpenVPN tunnels to work.
      ''
        cp dist-assets/ca.crt $out/share/mullvad
        ln -s ${openvpn-mullvad}/bin/openvpn $out/share/mullvad
        ln -s ${shadowsocks-rust}/bin/sslocal $out/share/mullvad
        ln -s $out/lib/libtalpid_openvpn_plugin.so $out/share/mullvad
      '' +
      # Set the directory where Mullvad will look for its resources by default to
      # `$out/share`, so that we can avoid putting the files in `$out/bin` --
  