Adding own certificate authority to macOS

I currently facing the problem that I created a certificate authority certificate and would like to add this custom CA to macOS. The general way would be to add it to the "System" area in my key chain and trust the certificate. This works fine for e.g. browsers. Now I would like to use command line tools like git and curl or one of intellij's IDEs. But then I am running into the following error message:

SSL certificate problem: unable to get local issuer certificate

I found out that curl on macOS is using LibreSSL. So my assumption would be that LibreSSL is not looking into macOS keychain. Do I think in the right direction? Or do I need to add my CA certificate to an additional directory?