If you use a curl built with GnuTLS (debian sid, for example), specifying --ciphers now does nothing.

But some people have need of that option to work. Here you can chime in on how it should be supported:

github.com/curl/curl/discussio…
#curl

TLS ciphers and GnuTLS priorities · curl curl · Discussion #16364

Some people migrating from curl+openssl to a curl+gnutls notice that their --ciphers arguments simply are ignored. First, this is documented and not a bug. Fine. But some of these users have a need...

^GitHub