There is a new pull request by tsndqst against master on the void-packages repository

https://github.com/tsndqst/void-packages gns3-2.2.17
https://github.com/void-linux/void-packages/pull/27006

gns3: update to 2.2.17, adopt
Update gns3-server and gns3-gui to 2.2.17

A patch file from https://github.com/void-linux/void-packages/pull/27006.patch is attached