On Wed, Feb 15, 2023 at 5:35 PM Stefano Rivera <stefa...@debian.org> wrote: > You sure it isn't doing an isolated build? Try --no-build-isolation.
I absolutely am not :D (I'm really not a Python expert... or about it's various build systems, pip, etc.). And that seems to have done the trick. And it further seems that there's a counter part with which I can do python3 -m build namely: --no-isolation Am I right that these options simply mean that it doesn't use a venv for the build, thereby "seeing" Debian's already installed packages (or better said the eggs/wheels/whatsoever from them)? Just for my confirmation: If my goal is to simply never ever have pip/build/etc. download anything from some location, but only use local sources (e.g. stuff from Debian package) is the following safe? I set /etc/pip.conf to: [global] no-index = true index-url = https://localhost/ cert = /usr/local/share/ca-certificates/dummy.crt (guess in principle the no-index should already be enough) It seems to work (in the sense of blocking downloads) for both, pip and python -m build ... but I don't quite understand why it also works for build (thought that was independent of pip). Awesome! Thanks guys :-) Philippe
