Installing binary (commerical) packages / repos (deb, rpm, etc)

I’ve been trying to find pointers as to the best way to install commercial binary packages on NixOS.

e.g. F5’s BigIP Edge VPN client, CrowdStrike Falcon, NGINX+.

I’ve found documentation for source based builds but would value pointers - google isn’t leading me to fruitful destinations.

I imagine that the derivation for NGINX+ could leverage the NGINX one… requiring licensing client certificate for retrieval of install package; but that might be overly complicating it compared to an independent package.