I try to build a universal wheel, but it rolls away
The answer I found is this:
python3 setup.py bdist_wheeldoesn't write the results anyplace I can find them.
python3 setup.py bdist_wheel -d .writes it, well, right here.
If I got you right, you search for resulting .whl file in ./build/... directory. But resulting files, both source distribution and wheel, usually by default get created in the ./dist/ directory, which is located near the build directory. Have you searched there?