Apex domains cannot have CNAME records.
Question and response
Question
dig gaialabs.org. NS
Answer
gaialabs.org. 3 NS ns1.ecoweb.ch.
gaialabs.org. 3 NS ns1.igaia.ch.
gaialabs.org. 3 NS ns2.ecoweb.ch.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0