Apex domains cannot have CNAME records.
Question and response
Question
dig werkman.org. NS
Answer
werkman.org. 5 NS ns-304.awsdns-38.com.
werkman.org. 5 NS ns-1855.awsdns-39.co.uk.
werkman.org. 5 NS ns-1789.awsdns-31.co.uk.
werkman.org. 5 NS ns-1516.awsdns-61.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0