Since the introduction of the new package v0.3.95 git version
There's some software that doesn't build (darktable in Factory)
And other that simply kaboom (ufraw for example)

Having released a new tarbal is certainly a good idea (for the updated
database) but upstream claim that they can't release a new version until 
https://github.com/lensfun/lensfun/issues/945 is fixed.

reference https://github.com/lensfun/lensfun/issues/1033

Also upstream project page state clearly that they need a new leader to drive
the project. https://lensfun.github.io/news/

I'm not sure we fix whatever things with this new code. A lot of tools now are
just failing behind the scene (hugin can't do pano) etc.