The CCL Common Lisp implementation expects the following database to be present: /gnu/store/xlwzwcgmqb2z4n36rr5wh9l6xc7yp976-ccl-1.11/lib/x86-headers/libc/constants.cdb However, the x86-headers directory and everything after it isn't present. Also missing is a functions.cdb in the same directory. This prevents some functionality from behaving properly and should be considered a bug.