current version is broken

[TimoGo]

version 2a9d545 from 20th August is broken, compiling ends up with:

  download icu4c : OK (8.3s)
  extract icu4c : ERROR
Traceback (most recent call last):
  File "/root/bin/kiwix-build", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/root/lib/python3.11/site-packages/kiwixbuild/__init__.py", line 166, in main
    builder.run()
  File "/root/lib/python3.11/site-packages/kiwixbuild/builder.py", line 201, in run
    self.prepare_sources()
  File "/root/lib/python3.11/site-packages/kiwixbuild/builder.py", line 111, in prepare_sources
    source.prepare()
  File "/root/lib/python3.11/site-packages/kiwixbuild/dependencies/base.py", line 160, in prepare
    self.command("extract", self._extract)
  File "/root/lib/python3.11/site-packages/kiwixbuild/dependencies/base.py", line 94, in command
    ret = function(*args, context=context)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/lib/python3.11/site-packages/kiwixbuild/dependencies/icu4c.py", line 142, in _extract
    pj(neutralEnv("archive_dir"), self.meson_patch.name),
                                  ^^^^^^^^^^^^^^^^
AttributeError: 'Source' object has no attribute 'meson_patch'
(root) root@9aef25fe1532:~/kiwix-build# 

For reproduction:

docker run -ti --rm  --name kiwixbuild debian:12.4

apt update && apt -y upgrade && apt -y install build-essential git && apt -y install meson ninja-build cmake sudo && apt -y install python3-pip virtualenv
cd
virtualenv -p python3 ./
source bin/activate
  
git clone https://github.com/kiwix/kiwix-build
cd kiwix-build/
pip3 install .
hash -r
kiwix-build zim-tools

When I use yesterdays version (ad72464), everything is fine.