Stork Grafana Links do not honor path from Grafana URL setting

Stork 1.9.0 from ISC packages

I have Grafana running on the same machine as Stork. Both are behind a NGINX reverse proxy. Stork is available on the root of the webserver:

http://machine.tld/

Grafana is available in a sub/path

http://machine.tld/grafana/

I have configured the Grafana path in the Stork settings, but Stork generates links that do not point to the Grafana Path:

http://machine.tld/d/hRf18FvWz/?var-subnet=1000&var-instance=stork-demo%3A9547

Result is an empty page from Stork when using such link.