anchor.diff: -{ lib, stdenv
  +{ lib
  +, stdenv
   , fetchurl
   , fetchFromGitHub
   , wrapQtAppsHook
  
positive.code:     requests
      tlslite-ng
      # plugins
      ckcc-protocol
      keepkey
      trezor
      btchip
    ] ++ lib.optionals enableQt [ pyqt5 qdarkstyle ];
  
    preBuild = ''
  
negative.code: }:
  
  let
    version = "4.1.1";
  
    libsecp256k1_name =
      if stdenv.isLinux then "libsecp256k1.so.0"
  