[Help] ERROR: libplacebo >= 4.192.0 not found using pkg-config while building mpv

[gsarkardev]

I have created a fork of mpv-build here: https://github.com/gsarkardev/mpv-build.
I am building it to target ubuntu linux systems and am facing the issue that libplacebo cannot be found using pkg-config. libplacebo is being correctly built and is added to the pkg-config, and even I added "LD_LIBRARY_PATH" env variable. but still I get the same error. Can I get some help on this?

For logs, please see the latest run on Github Actions: https://github.com/gsarkardev/mpv-build/actions