[postmodern-devel] loading trivial-utf-8

In my project trivial-utf-8 is already loaded. Postmodern does it again which leads to warnings: Warning: (DEFPARAMETER *OPTIMIZE*) being redefined in C:\Users\jens\quicklisp\dists\quicklisp\software\trivial-utf-8-20101006-darcs\trivial-utf-8.lisp (previously in C:\Users\jens\quicklisp\dists\quicklisp\software\postmodern-20110619-git\cl-postgres\trivial-utf-8.lisp). Warning: (DEFUN UTF-8-BYTE-LENGTH) being redefined in ... What is the best strategy to avoid this? Thanks Jens