Hi! I noted that calculate-sources was upgraded to 5.4.x. But the problem is the 4.19.x was deleted. I’m using nvidia-drivers, with legacy support (390.xx), which by the moment it supports only kernel versions lower than 5.4 (in the Gentoo Portage Tree is the same situation), so I cannot use the nvidia-drivers if kernel is 5.4 or greater. So please, restore the 4.19.x to use as optional.
Now I installed the calculate-sources and the nvidia-drivers and works without problems. I think Gentoo ebuilds should change the restriction of the kernel version.