Guillaume Le Vaillant writes: > Patches applied as 604cd06e357ee31d7c7be922d9f615b60fe99db9 and > following with a few modifications (package moved at the right place in > the file, a few simplifications and fixes). > Thanks. Thanks, but I'm unable to reproduce the ecl-cl-fast-ecs issue manually, could it be an issue with guix somehow? Without your patch, the build fails for me too. $ guix build -e '(begin (use-modules (guix build-system asdf) (gnu packages lisp-xyz)) (sbcl-package->ecl-package sbcl-cl-fast-ecs))' But if I try to build manually, calling dot does not trigger any problems. $ guix shell ecl -D ecl-cl-fast-ecs --pure [env]$ ecs (asdf:load-asd (merge-pathnames "cl-fast-ecs.asd")) (asdf:load-system "cl-fast-ecs") (asdf:load-system "cl-fast-ecs/tests") (asdf:test-system "cl-fast-ecs")