echo '(reset-handler abort) (keyboard-interrupt-handler abort) (generate-wpo-files #t)'  '(compile-file "core.sls")' \| scheme -q
compiling core.sls with output to core.so
Exception: attempt to reference unbound identifier ephemeron-cons at line 7, char 22 of core/ephemeron.ss
make: *** [core.so] Error 255

@mflatt have you gotten this error

@spall either you need a newer Chez (one with ephemeron-cons, which was a recent addition), or else you just need to delete chezpart.so and rebuild everything. (I probably should have listed those options in the opposite order.)

looks like I need to update chez. thanks