cl-asdf postinstall script hangs: SYSTEM-SOURCE-FILE is undefined

Binary package hint: cl-asdf

When trying to install cl-asdf 20091221-1 on lucid.

==========================
Setting up cl-asdf (1:20091221-1) ...
Reinstalling for clisp
Recompiling Common Lisp Controller for clisp
Installing clc...
;; Loading file /usr/lib/clisp-2.44.1/install-clc.lisp ...
;; Loading file /usr/share/common-lisp/source/common-lisp-controller/common-lisp-controller.lisp ...
;; Loaded file /usr/share/common-lisp/source/common-lisp-controller/common-lisp-controller.lisp
;; Loading file /var/cache/common-lisp-controller/0/clisp/common-lisp-controller/common-lisp-controller.fas ...
;; Loaded file /var/cache/common-lisp-controller/0/clisp/common-lisp-controller/common-lisp-controller.fas
;; Loading file /var/cache/common-lisp-controller/0/clisp/cl-asdf/asdf.fas ...
;; Loaded file /var/cache/common-lisp-controller/0/clisp/cl-asdf/asdf.fas
;; Loading file /var/cache/common-lisp-controller/0/clisp/cl-asdf/wild-modules.fas ...
;; Loaded file /var/cache/common-lisp-controller/0/clisp/cl-asdf/wild-modules.fas
;; Loading file /var/cache/common-lisp-controller/0/clisp/common-lisp-controller/post-sysdef-install.fas ...
;; Loaded file /var/cache/common-lisp-controller/0/clisp/common-lisp-controller/post-sysdef-install.fas
;; Loaded file /usr/lib/clisp-2.44.1/install-clc.lisp
;; Wrote the memory image into /usr/lib/clisp-2.44.1/full/lispinit.mem (3,292,836 bytes)
created /usr/lib/clisp-2.44.1/full/lispinit.mem as expected.
-rw-r--r-- 1 root root 3292836 2010-02-27 16:32 /usr/lib/clisp-2.44.1/full/lispinit.mem

Done rebuilding
Reinstalling for ecl
Recompiling Common Lisp Controller for ecl
/usr/lib/common-lisp/bin/ecl.sh loading and dumping clc.
;;; Loading "/usr/lib/ecl/install-clc.lisp"
;;; Loading #P"/usr/lib/ecl-9.6.1/cmp.fas"
;;; Loading #P"/usr/lib/ecl-9.6.1/sysfun.lsp"

Saving to new-ecl...
;;; Loading "/var/cache/common-lisp-controller/0/ecl/common-lisp-controller/common-lisp-controller.fas"
;;; Loading "/var/cache/common-lisp-controller/0/ecl/cl-asdf/asdf.fas"

The function SYSTEM-SOURCE-FILE is undefined.
Available restarts:

1. (QUIT-DEBUGGER) Quit debugger level 1.
2. (ABORT) ABORT

Top level.
ASDF>
======================

The restarts don't seem to have any effect. Entering either 1 or 2
does not do anything. The only way out is to SIGINT
(ctrl-c). Configuration is reported as failed by aptitude. There is a
CPU intensive ecl-original process that gets spawned and is not
killed. Since the configuration is retried each time aptitude is run
these ecl-original processes accumulate and eventually dominate the
CPU.