Arduino IDE 1.8.7 fatal error: opening dependency file /dev/null.d:

Using Arduino IDE 1.x
4

DrAzzy, Apologies for the delay, but I was not auto-notified of your reply.

ls -l /dev/null*
crw-rw-rw- 1 root root 1, 3 Oct 17 14:11 /dev/null