Sadman Sakib

I had a similar issue on Debian 9. Installing `apt-cacher-ng` from `.deb` package solved it for me. Saw it in [this message](https://groups.google.com/g/opennetworklinux/c/K3Dtt7uWjyk/m/IBkKDZxEAwAJ).

A person suggested [here](https://gitlab.tongyuejun.cn/zhangjx/p4_doc/-/blob/main/Wedge100BF_User_Manual.org#)(line 382-392) intstalling a `onl-kernel` .deb package and then creating a symlink to the `mbuilds/` directory of the installed package. But, I'm not sure if `onl-kernel` .deb...

I later found that when I built ONL installer on Debian 9 machine, an `mbuilds/` directory was created in `$ONL/REPO/stretch/extracts/onl-kernel-4.9-lts-x86-64-all_amd64/usr/share/onl/packages/amd64/onl-kernel-4.9-lts-x86-64-all` directory. I zipped this `mbuilds/` dir, transferred it to switch...

I found that `protobuf==4.21.4` was getting installed. Setting it to an earlier version, `3.17.3`, in `setup.py` removes the error.

 Hi, directives like #if and #endif are not recognized too. Probably will require similar grammar.