```common lisp
(asdf:defsystem #:explicit-bind

  :author "Jean-Philippe Paradis <hexstream@gmail.com>"

  ;; See the UNLICENSE file for details.
  :license "Public Domain"

  :description "UNSUPPORTED. UNSTABLE? INCOMPLETE? Effectively enables intermixing of any number of LET, LET*, (an enhanced version of) FLET, MULTIPLE-VALUE-BIND and DESTRUCTURING-BIND constructs, at the cost of only one level of indentation."

  :version "0.1"
  :components ((:file "package")

	       (:file "with-shadowed-bindings"
                      :depends-on ("package"))
	       (:file "flet-star"
                      :depends-on ("package"))

               (:file "bubble-expand"
                      :depends-on ("package"))
               (:file "expand"
                      :depends-on ("package"
                                   "bubble-expand"))

	       (:file "merge"
                      :depends-on ("package"))
	       (:file "main"
                      :depends-on ("package"
                                   "expand"
                                   "merge"))))
```

Revert back to :serial t.
user
```common lisp
(asdf:defsystem #:explicit-bind

  :author "Jean-Philippe Paradis <hexstream@gmail.com>"

  ;; See the UNLICENSE file for details.
  :license "Public Domain"

  :description "UNSUPPORTED. UNSTABLE? INCOMPLETE? Effectively enables intermixing of any number of LET, LET*, (an enhanced version of) FLET, MULTIPLE-VALUE-BIND and DESTRUCTURING-BIND constructs, at the cost of only one level of indentation."

  :version "0.1"
  :serial cl:t
  :components ((:file "package")

	       (:file "with-shadowed-bindings")
	       (:file "flet-star")

               (:file "bubble-expand")
               (:file "expand")

	       (:file "merge")
	       (:file "main")))
```
assistant