unicorn Did you see this error when installing the package?
[...]
Checking integrity... done (0 conflicting)
[1/45] Installing linux_base-c7-7.9.2009...
Cannot install package: kernel missing 64-bit Linux support
pkg: PRE-INSTALL script failed
Looks like a custom kernel will have to be compiled.
EDIT: or the linux64.ko
module will need to be loaded.