The current Gentoo mirror contains an older version of lensfun (0.3.3), and there's an easy way to upgrade to 0.3.95. See the attached ebuild file. Reproducible: Always Steps to Reproduce: 1. emerge -av lensfun 2. latest version is 0.3.3
Created attachment 799001 [details] lensfun 0.3.95 ebuild
I'd rather avoid that because of incompatibilities with applications for now. (That's somewhat an alpha release...) We do have 0.3.4_rc1 now with lots of new definitions.