anchor.diff:  { stdenv, fetchurl, libxml2, gnutls, libxslt, pkgconfig, libgcrypt, libtool
  -, openssl, nss }:
  +, openssl, nss, lib, runCommandCC, writeText }:
   
  +lib.fix (self:
   let
     version = "1.2.28";
   in
  
positive.code:     moveToOutput "lib/xmlsec1Conf.sh" "$dev"
    '';
  
    meta = {
      homepage = http://www.aleksey.com/xmlsec;
      downloadPage = https://www.aleksey.com/xmlsec/download.html;
  
negative.code:     updateWalker = true;
    };
  }
  )
  