https://mirrors.wikimedia.org/ubuntu/pool/universe/h/haskell-libbf/?C=N;O=A
Index of /ubuntu/pool/universe/h/haskell-libbf
index ofubuntupooluniverseh
https://archlinux.org/packages/extra/x86_64/libbf/
Arch Linux - libbf 2021.03.27-1 (x86_64)
arch linux