Error building vlckit macOS 10.15.7

[Dazzid]

I would like to incorporate vlc video player in a custom C++ application in MacOS.
I'm following this instruction https://github.com/videolan/vlckit
However, the building process has an error:

[info] Compiling x86_64 with SDK version 10.15.6, platform macosx
ERROR: Failed to find SDK 'macosx10.15.6'

I also tryied with this comand:
./compileAndBuildVLCKit.sh -x -k /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/macosx10.15.6

Same error. The only real difference is that in my path I have MacOSX.sdk, I created a copy calling it MacOSX10.15.6.sdk, but still doesn't work.
What would be the solution?
Thanks for the help