clone 如下兩個 git 倉庫：
git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
https://salsa.debian.org/kernel-team/firmware-nonfree.git
安裝編譯相關包：
apt -y install linux-support-xxx-x
接下來的操作在 firmware-nonfree 目錄下進行
cd firmware-nonfree
修改內核版本號文件：
debian/rules.defs
KERNELVERSION := xxx-x
檢查在 linux-firmware.git 裏面，有哪些 fw 是新添加的：
debian/bin/check_upstream.py ../linux-firmware
拷貝文件：
cp -rpv ../linux-firmware/* ./
更新本地文件和符號鏈接：
./copy-firmware.sh ./
生成製作 deb 包所需要的 control 文件：
debian/rules debian/control
由於版本更新，執行該命令可能有報錯輸出，如：
/usr/bin/make -f debian/rules debian/control-real
...
Traceback (most recent call last):
File "debian/bin/gencontrol.py", line 391, in <module>
GenControl()()
File "debian/bin/gencontrol.py", line 150, in __call__
self.do_main(packages, makefile)
File "debian/bin/gencontrol.py", line 189, in do_main
self.do_package(packages, makefile, package, vars.copy(), makeflags.copy())
File "debian/bin/gencontrol.py", line 288, in do_package
f, f_real, version = files_real[f]
...
像以上的錯誤，發現 cxgb4 目錄下，並沒有 t4fw-1.23.4.0.bin 文件，但有更新的 t4fw-1.24.11.0.bin 文件。需要修改 debian/config/misc-nonfree/defines 文件，更新相應條目。
然後重新運行 debian/rules debian/control
This target is made to fail intentionally, to make sure
that it is NEVER run during the automated build. Please
ignore the following error, the debian/control file has
been generated SUCCESSFULLY.
exit 1
...
出現這樣的提示，表示 control 正確生成。
生成最新的 changelog 日誌：
PYTHONPATH=/usr/share/linux-support-xxx-x/lib/python/ debian/bin/release-update ../linux-firmware 20200329
按原有格式，修改更新相應的 debian/config/×/defines 文件
構建軟件包：
dpkg-buildpackage -b