anchor.diff:  , mock
   , magic-wormhole-transit-relay
   , magic-wormhole-mailbox-server
  +, pytestCheckHook
   }:
   
   buildPythonPackage rec {
  
positive.code:     install -Dm644 docs/wormhole.1 $out/share/man/man1/wormhole.1
    '';
  
    checkPhase = ''
      export PATH=$out/bin:$PATH
      export LANG="en_US.UTF-8"
      export LC_ALL="en_US.UTF-8"
      substituteInPlace src/wormhole/test/test_cli.py \
        --replace 'getProcessOutputAndValue("locale", ["-a"])' 'getProcessOutputAndValue("locale", ["-a"], env=os.environ)' \
        --replace 'if (os.path.dirname(os.path.abspath(wormhole))' 'if not os.path.abspath(wormhole).startswith("/nix/store") and (os.path.dirname(os.path.abspath(wormhole))' \
        --replace 'locale_env = dict(LC_ALL=locale, LANG=locale)' 'locale_env = dict(LC_ALL=locale, LANG=locale, LOCALE_ARCHIVE=os.getenv("LOCALE_ARCHIVE"))'
  
      trial -j$NIX_BUILD_CORES wormhole
    '';
  
    meta = with lib; {
      description = "Securely transfer data between computers";
      homepage = "https://github.com/magic-wormhole/magic-wormhole";
  
negative.code:     mock
      magic-wormhole-transit-relay
      magic-wormhole-mailbox-server
      pytestCheckHook
    ];
  
    postPatch = lib.optionalString stdenv.isLinux ''
  