Installation on Linux with SBCL 2.3.7

[MaxGyver83]

I'm trying to install CLFSWM. I tried this:

$ cd ~/repos
$ git clone https://github.com/LdBeth/CLFSWM.git
$ cd CLFSWM
$ sbcl --load load.lisp

I get this error message:

This is SBCL 2.3.7, 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.
  ==> Requiring ASDF
ASDF version: 3.3.1
  ==> Requiring CLX

debugger invoked on a SB-C::INPUT-ERROR-IN-LOAD in thread
#<THREAD tid=12928 "main thread" RUNNING {1004788113}>:
  READ error during LOAD:

    Package TOOLS does not exist.

      Line: 129, Column: 30, File-Position: 3887

      Stream: #<SB-INT:FORM-TRACKING-STREAM for "file /media/home/max/repos/CLFSWM/load.lisp" {1001DAA283}>

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

restarts (invokable by number or by possibly-abbreviated name):
  0: [ABORT   ] Abort loading file "/media/home/max/repos/CLFSWM/load.lisp".
  1: [CONTINUE] Ignore runtime option --load "load.lisp".
  2:            Skip rest of --eval and --load options.
  3:            Skip to toplevel READ/EVAL/PRINT loop.
  4: [EXIT    ] Exit SBCL (calling #'EXIT, killing the process).

(SB-C:COMPILER-ERROR SB-C::INPUT-ERROR-IN-LOAD :CONDITION #<SB-INT:SIMPLE-READER-PACKAGE-ERROR "Package ~A does not exist." {1001EB14D3}> :STREAM #<SB-INT:FORM-TRACKING-STREAM for "file /media/home/max/repos/CLFSWM/load.lisp" {1001DAA283}>)

Package TOOLS does not exist. This should be src/tools.lisp (which is available), right?