#| Uncommenting this solves the problem, but not particularly elegant
(in-package :asdf/bundle)

#+(not (or clasp ecl mkcl))
(defun make-library-system (name pathname)
  (make-instance 'prebuilt-system
                 :name (coerce-name name)
                 :static-library (resolve-symlinks* pathname)))
|#

(in-package :cl-user)

(defun main ()
  (format t "success!~%")
  (uiop:quit))

(defun bug ()
  (asdf:operate 'asdf:program-op
                (asdf:defsystem "cffi-toolchain-bug"
                  :depends-on (:cffi-toolchain)
                  :build-operation asdf:program-op
                  :build-pathname "cffi-toolchain-bug"
                  :entry-point "cl-user::main")))

(bug)