How to properly use cxml/klacks library with quicklisp (and sbcl)? – Debian

Overview
I’m trying to run a simplified version of this code, that needs the cxml and klacks library for XML parsing. (The concrete code is Chapter 47 of the book "The Art of Postgresql".)
Since I know very little about (Common) Lisp/ASDF/Quicklisp, I don’t know how to properly install the required cxml/klacks library.

System
In case that matters, I’m using SBCL 1.5.5.debian under Ubuntu (For the records, I had tried clisp previously, but I found that it comes with a very outdated version of ASDF.)

Steps I did so far

In bash:

sudo apt-get install cl-cxml

(Indeed /usr/share/common-lisp/source/cxml/ and /usr/share/common-lisp/source/cxml/klacks/ are now present on my system.)

In sbcl REPL:

(ql:quickload :cxml)

Result: a long error message, whose gist seems to be Component "cxml/dom" not found. (Even though /usr/share/common-lisp/source/cxml/dom does exist, but I’m not sure it matters.) See complete error message at the end.

(ql:quickload :klacks)

Result: another long error, whose gist is System "klacks" not found (even though, again, the directory is present on the system).

Remark

Using qucikload for other libraries works, e.g.:

(ql:quickload :postmodern)
(ql:quickload :zip)
(ql:quickload :yason)

Questions

In short: what is the proper way of getting cxml and klacks installed on the above system?

Besides the solution to this concrete issue, I’d like to understand a bit better what is going on, in particular:

• Can all dependencies be installed with quicklisp, or are there some that support it and some that don’t? (And in this case, is cxml a dependency that does not support quicklisp? How can I know which packages do support it?)

• Does quciklisp look at the local installation (i.e. /usr/share/common-lisp/source/cxml/) at all, or does it work only from an online repository? (In other words: does it matter that I installed cl-xml via apt-get?)

• If it takes the local path into account, then why doesn’t it find cxml/dom and cxml/klacks?

• Since klacks is a subpackage of cxml, do I need to import it separately or not?
  By browsing the mentioned source code, especially package.lisp and pubnames.asd, I don’t see it explicitly imported. Still it is used in the code, e.g. here. So I guess what is needed is to import cxml explicitly, and then all subpackages (including klacks) get also imported, automatically prefixed with the proper namespace?

Detailed error messages

* (ql:quickload :cxml)
;;; Checking for wide character support... WARNING: Lisp implementation doesn't use UTF-16, but accepts surrogate code points.
 yes, using code points.
To load "cxml":
  Load 1 ASDF system:
    cxml
; Loading "cxml"
;;; Checking for wide character support... WARNING: Lisp implementation doesn't use UTF-16, but accepts surrogate code points.
 yes, using code points.
.
;;; Checking for wide character support... WARNING: Lisp implementation doesn't use UTF-16, but accepts surrogate code points.
 yes, using code points.
;;; Checking for wide character support... WARNING: Lisp implementation doesn't use UTF-16, but accepts surrogate code points.
 yes, using code points.
;;; Building Closure with CHARACTER RUNES
To load "cxml/dom":
  Load 3 ASDF systems:
    closure-common puri trivial-gray-streams
  Install 1 Quicklisp release:
    cxml
; Loading "cxml/dom"
;;; Checking for wide character support... WARNING: Lisp implementation doesn't use UTF-16, but accepts surrogate code points.
 yes, using code points.
.
debugger invoked on a ASDF/FIND-COMPONENT:MISSING-COMPONENT in thread
#<THREAD "main thread" RUNNING {10005504C3}>:
  Component "cxml/dom" not found

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

restarts (invokable by number or by possibly-abbreviated name):
  0: [RETRY                        ] Retry ASDF operation.
  1: [CLEAR-CONFIGURATION-AND-RETRY] Retry ASDF operation after resetting the
                                     configuration.
  2:                                 Retry ASDF operation.
  3:                                 Retry ASDF operation after resetting the
                                     configuration.
  4: [ABORT                        ] Give up on "cxml/dom"
  5:                                 Give up on "cxml"
  6:                                 Exit debugger, returning to top level.

((:METHOD ASDF/OPERATE:OPERATE (SYMBOL T)) ASDF/LISP-ACTION:LOAD-OP "cxml/dom" :VERBOSE NIL) [fast-method]
   error finding frame source: Bogus form-number: the source file has probably
                               changed too much to cope with.
   source: NIL
0]

* (ql:quickload :klacks)

debugger invoked on a QUICKLISP-CLIENT:SYSTEM-NOT-FOUND in thread
#<THREAD "main thread" RUNNING {10005504C3}>:
  System "klacks" not found

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

restarts (invokable by number or by possibly-abbreviated name):
  0: [CONTINUE] Try again
  1: [ABORT   ] Give up on "klacks"
  2:            Exit debugger, returning to top level.

((LABELS QUICKLISP-CLIENT::RECURSE :IN QUICKLISP-CLIENT::COMPUTE-LOAD-STRATEGY) "klacks")
   source: (CERROR "Try again" 'SYSTEM-NOT-FOUND :NAME NAME)