Using the setup application commandline: multiple -P arguments possible?

Hello cygwinistas. As in the Subject: , I am puzzled as to how I can ask
setup-x86_64.exe to install multiple packages in a single run.
For reference, I'm using
https://cygwin.com/cygwin/faq/faq.html#faq.setup.cli as my guide to using
the commandline to direct setup.

I've tried this: using multiple -P <arg> flags, but it seems that only the
first package thus specified is noticed by setup.

I've thought of trying these:
  -P 'package1,package2,package3,[...]'
  -P 'package1 package2 package3 [...]'

I thank in advance for answers.
-- 
Soren Andersen
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