How to get operating system information in nim-lang?

[tmsa04]

At the bottom of that link is a further link to here, which explains it is 
hoped that this format is widely adopted even on non-systemd distros: 
<http://0pointer.de/blog/projects/os-release> The date on that post is 2012, so 
the concept has been in existence for quite some time now. /etc/os-release is 
certainly present on Artix and Devuan, which are both non-systemd.