[Chicken-users] problem with require

[Chris Double]

When running csi, if I do a (require 'srfi-13) I get an error:

   Error: (require) can not find required extension: srfi-13

If I run csi from the chicken src directory then it works fine:

>>> (require 'srfi-13)
; loading srfi-13.scm ...
>>>

Have I got something configured incorrectly? What do I need to do to get csi 
to find srfi-13?

Chris.