CI - Warning: unable to build chain to self-signed root for signer

I am able to sign my application when logged in to the machine, however when build is running in CI (Jenkins), I get this: "Warning: unable to build chain to self-signed root for signer.." We just renewed or certificates, so I am not sure about previous procedure, but it used to work without temporary keychain and stuff, I believe.

What should be the recommended way to sign an application on CI? What keychain should we use? system? temporary? other method?

Thanks, Itay

CI - Warning: unable to build chain to self-signed root for signer
 
 
Q