{ mkDerivation }: # How to obtain `sha256`: # nix-prefetch-url --unpack https://github.com/erlang/otp/archive/OTP-${version}.tar.gz mkDerivation { version = "22.3.4.20"; sha256 = "sha256-EUErOCW16eUb/p5dLpFV7sQ3mXlCF/OgOvGAAyYEvLo="; }