```common lisp
(cl:in-package #:common-lisp-user)

(asdf:defsystem :sicl-arithmetic
  :serial t
  :components
  ((:file "packages")
   (:file "support")))

```

Define ASDF system in the package ASDF-USER.
user
```common lisp
(cl:in-package #:asdf-user)

(defsystem :sicl-arithmetic
  :serial t
  :components
  ((:file "packages")
   (:file "support")))
```
assistant