I got reports on failed installations with the installation method offered in the documentation.

Install Betula the following way instead:

git clone https://git.sr.ht/~bouncepaw/betula

cd betula

git checkout v1.0.0

CGO_ENABLED=1 go build -o betula ./cmd/betula

You would need Git, C and Go compilers for building the program. I will update the documentation accordingly later.

If you couldn't install Betula before, try now.

Thanks for letting me know!