if_igb.ko symbolic link generation is still messed up in that it hard wires the path at installkernel time, messing up copying to other places
[The example here happens to be for amd64 -> aarch64 cross builds.]
The following is from after copying/moving the kernel from where it
was originally, such as (locally) installed on the build machine.
Example of symbolic links from some recent activity under head
-r323246 (producing -r323246 again):