I'm not sure why this patch was needed, but it builds and works find without it now. Maybe this is connected with https://github.com/NixOS/nixpkgs/pull/30483
Create the top-level packages attribute 'hylafaxplus' that builds HylaFAX+ . Note: The nobody uid and the nogroup gid are hardcoded in the package. The package build recipe file contains options to modify these ids.