missing sopcinfo file after QSYS system generation?

We are currently automating the QSYS system generation step by running ip-generate from the command line in our build system. However, I am starting to suspect that other sites might be automating the QSYS system generation step by adding the QSYS dot qsys source file to their Quartus project. In contrast we are currently adding the generated QSYS dot qip file to our Quartus project.

Do any of you add the QSYS dot qsys source file directly to their Quartus project, and presumably benefit when Quartus automates the QSYS system generation, and hopefully also the QSYS subsystem dependencies checking which is definitely a weakness now with our build system?