Due to too specific software and two-factor authentication, I need to use openvpn with a hardware key. when building openvpn in Solus, pkcs11 is turned off.
I tried to rebuild openvpn with the --enable-pkcs11 option, but there was a problem at the build stage. I can't solve it myself.
"PKCS 11 is enabled, but libpkcs11-helper is missing".
Which I also tried to collect, but there is no experience and no understanding.
I ask for help.. I'm new to Solus myself, I like the system and I don't want to go to others.
I'm sorry for my poor English.

Looks like it would need https://github.com/OpenSC/pkcs11-helper as a build dependency which does not appear to be in our repository so you would have to maintain that too.

It is possible we could enable this in openvpn for everyone rather than making you maintain it yourself. But I can not make that decision. I would suggest you file a request here https://dev.getsol.us/maniphest/task/edit/form/1/ so the powers that be can evaluate the request. Feel free to mention I told you to file the request to enable it and link to this thread.