PL/Ruby

Dear sirs,
Does someone made PL/Ruby working on 4.7.1?
I tried alot of things. Manual install, port install and nothing happend.
Please give me the idea how to fix the problem with
plruby.c: In function `pl_tuple_put':
plruby.c:498: error: too few arguments to function `tuplestore_begin_heap'
plruby.c: In function `pl_func_handler':
plruby.c:1450: error: too few arguments to function `tuplestore_begin_heap'
*** Error code 1

Stop in /usr/ports/databases/postgresql-plruby/work/plruby-0.3.8.
*** Error code 1

Stop in /usr/ports/databases/postgresql-plruby.