So, I will change asdf like this: (uiop/package:define-package :asdf/user (:nicknames :asdf-user) ;; TODO: it would be nice to have :UIOP in the list, ;; but we need test compatibility with cl-test-grid first. - (:use :uiop/common-lisp :uiop/package :asdf/interface)) + (:use :cl :uiop)) Right?