[Hat] CVS is broken

Having just done a CVS update, I got the following error compiling hat: ../compiler98/OsOnly.hs:46:28: Not in scope: `isPrefixOf' make[1]: *** [/Users/tatd2/Documents/Work/hat/lib/ix86-Darwin8/hat- trans] Error 1 I don't really want to fix it and check in, because some of my copy is equally broken at the moment. Would love it if someone fixed it. Thanks Bob