This is SBCL 1.0.11.debian, an implementation of ANSI Common Lisp.
More information about SBCL is available at <http://www.sbcl.org/>.

SBCL is free software, provided as is, with absolutely no warranty.
It is mostly in the public domain; some portions are provided under
BSD-style licenses.  See the CREDITS and COPYING files in the
distribution for more information.
* (asdf:oos 'asdf:load-op :parenscript)

; loading system definition from /usr/share/common-lisp/systems/parenscript.asd
; into #<PACKAGE "ASDF0">
; registering #<SYSTEM :PARENSCRIPT {A9B1469}> as PARENSCRIPT
; registering #<SYSTEM :PARENSCRIPT.TEST {AB21C69}> as PARENSCRIPT.TEST
NIL
* (defpackage :whatever (:use :parenscript))

debugger invoked on a SB-KERNEL:SIMPLE-PACKAGE-ERROR in thread #<THREAD "initial thread" {A84D679}>:
  The name "PARENSCRIPT" does not designate any package.

Type HELP for debugger help, or (SB-EXT:QUIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [ABORT] Exit debugger, returning to top level.

(SB-INT:%FIND-PACKAGE-OR-LOSE "PARENSCRIPT")
0]