cpack -B build/ fails in parent directory

Question

I want to make a Debian package using cpack.

I want to stay in base_folder/. It contains a source folder src/ and a build/ folder with temporary build files and build artifacts:

base_folder$ ls
build src

I try to make the package

base folder$ cpack -B build/
CPack Error: CPack generator not specified

But if I go to build/ then it works OK:

cd build/
cpack

How I can use cpack without cd build/?

This is my example to reproduce... cmake version 3.26.4

Answer 1

Should be

cpack --config build/CPackConfig.cmake -B build/

I have updated my example. Now works good.