The lisp koans should execute on any common lisp implementation modulo the threads koan group. If you modify the file ".koans" https://github.com/google/lisp-

The lisp koans should execute on any common lisp implementation modulo the threads koan group. If you modify the file ".koans" https://github.com/google/lisp-koans/blob/master/.koans https://github.com/google/lisp-koans/blob/master/.koans to remove the last entry ":threads" it should work.