With a recent cvs checkout I get the follow error when building clpython: ; compiling (DEFGENERIC PY-** ...); compilation aborted because of fatal error: ; READ failure in COMPILE-FILE: ; SB-INT:SIMPLE-READER-PACKAGE-ERROR at 134051 (line 3470, column 49) on #<SB-SYS:FD-STREAM for "file /home/jdn/work/lisp/clpython/core/classes.lisp" {1003B44871}>: ; Symbol "__POW__" not found in the CLPYTHON.USER package. ; compilation aborted after 0:00:03 WARNING: COMPILE-FILE warned while performing #<COMPILE-OP NIL {10029050F1}> on #<CL-SOURCE-FILE "classes" {1002AE4411}>. debugger invoked on a ASDF:COMPILE-FAILED in thread #<THREAD "initial thread" RUNNING {100266AA41}>: erred while invoking #<COMPILE-OP NIL {10029050F1}> on #<CL-SOURCE-FILE "classes" {1002AE4411}> I am on a Ubuntu 8.10 box running sbcl 1.0.18. With regards, Jason