buildbot failure in XEmacs on imac osx cfg0

The Buildbot has detected a new failure on builder imac osx cfg0 while building XEmacs.
Full details are available at:
 http://www.lidell.nu/xemacs-buildbot/builders/imac%20osx%20cfg0/builds/0

Buildbot URL: http://www.lidell.nu/xemacs-buildbot/

Buildslave for this Build: rtoy-imac

Build Reason: The web-page 'force build' button was pressed by 'mats': test the build slave

Build Source Stamp: HEAD
Blamelist: 

BUILD FAILED: failed configure

sincerely,
 -The Buildbot