anchor.diff:  , canonicaljson
   , daemonize
   , jinja2
  +, jsonschema
   , matrix-angular-sdk
   , matrix-synapse-ldap3
   , msgpack-python
   , netaddr
  +, phonenumbers
   , pillow
   , psutil
   , py-bcrypt
  
positive.code: }:
  
  let
    version = "0.19.3";
  in
  buildPythonPackage {
    name = "synapse-${version}";
  
negative.code:     canonicaljson
      daemonize
      jinja2
      jsonschema
      matrix-angular-sdk
      matrix-synapse-ldap3
      msgpack-python
      netaddr
      phonenumbers
      pillow
      psutil
      py-bcrypt
  