How to get shorter SERVER_VERSION in psql-prompt?

[Andreas Joseph Krogh]

Hi all, I'm using the Ubuntu-packages and have this in my .psqlrc:
 
\set PROMPT1 '%[%033[35m%]%n@%m:%>%[%033[0m%] %:server_version: 
%[%033[32m%]%/%[%033[0m%]%R%# '
  
This results in this verver_version:
10.5 (Ubuntu 10.5-1.pgdg18.04+1)
  
Is it possible to adjust this somehow so it outputs only "10.5"?
 
Thanks in advance.
 
-- Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
andr...@visena.com <mailto:andr...@visena.com>
www.visena.com <https://www.visena.com>
 <https://www.visena.com>