Hi,

As per the comment in the source, and the nginx documentation[0], the 
mainline version is recommended over stable version.

Also, I submitted an update with HTTP/3 support sometime ago, in case 
you wish to give it a shot[1].

References:
[0] 
https://docs.nginx.com/nginx/admin-guide/installing-nginx/installing-nginx-open-source/
[1] https://issues.guix.gnu.org/78302

Thanks!
-- 
Ashish SHUKLA | GPG: F682 CDCC 39DC 0FEA E116  20B6 C746 CFA9 E74F A4B0

"If I destroy you, what business is it of yours ?" (Dark Forest, Liu Cixin)