anchor.diff:  }:
   
   let
  -  version = "0.19.3";
  +  version = "0.20.0";
   in
   buildPythonPackage {
     name = "synapse-${version}";
  
positive.code:     owner = "matrix-org";
      repo = "synapse";
      rev = "v${version}";
      sha256 = "d41b81f69fd66f524e6bb338d5d96c054e53e749e8003ae8bac265233fb7f46b";
    };
  
    propagatedBuildInputs = [
  
negative.code:     canonicaljson
      daemonize
      jinja2
      jsonschema
      matrix-angular-sdk
      matrix-synapse-ldap3
      msgpack-python
      netaddr
      phonenumbers
      pillow
      psutil
      py-bcrypt
  