How to override .desktop files in /usr/share/akonadi/agents

Dear list,


There are a number of autostarted akonadi agents that I do not use 
(migration agent, email alert,…). I know that I can disable them by
removing 'Autostart' in the line

	X-Akonadi-Capabilities=Unique,Autostart

in these files. However, this does not seem like the proper way to do it. 
(Will be lost upon updates.)

Is there a way to override this properly. Ideally just blocking the 
Autostart part, but if necessary by putting a modified version of the files 
in a location that has higher precedence.


Best,

Erik