[cmucl-imp] 2011-04 snapshot cannot compile itself?

I'm trying to cross build the 2011-04 snapshot sources using the 2011-04 binary, with the command $ src/tools/cross-build-world.sh linux-x86/ cross-x86/src/tools/cross-scripts/cross-x86-x86.lisp This fails when loading worldbuild.lisp ; Error: Read error at 40380: ; "(vm:floating-point-modes/\))))" ; Reader error at 40385 on #<Stream for file "/var/tmp/build/cmucl-rhea/src/code/irrat.lisp">: ; Symbol "FLOATING-POINT-MODES" not found in the X86 package. ; Maybe I Should be doing something differently? --- Madhu