sbcl-source 2:2.2.8-1 (amd64 binary) in ubuntu kinetic

 This package provides the source code for SBCL -- a development
 environment for the ANSI Common Lisp language.
 .
 The source code is useful in conjunction with development
 environments and debuggers like SLIME, that allow macro expansion and
 lookup of source definitions.
 .
 Installing this package enables your source browser to dig deeply
 into the core of Steel Bank Common Lisp.