Customizing packages?

Hi there, I wonder how you long-time CRUXers handle the case if a package from core/opt/xorg/contrib port does not suit your needs? I read it is discouraged to create duplicate (local) packages but alternatives like installing local builds directly in /usr/local, /opt or ~/.local seem also suboptimal. For example, I need sftp support in libcurl which needs linking against libssh. This is not configured in the official port. So I have to create my own solution and I want it to integrate as smooth as possible with the ports systems and keep CRUX's philosophy. What do you recommend? Thanks for your input! Best regards, Martin