Enthuware

I suppose you have a typo in the explanation
javac --module-source-path src --module-path thirdpartymodulesutils.jar -d out --module modules should be thirdpartymodules/utils.jar

You are right. Fixed.
thank you for your feedback!

last answer should be either -m or --module
-module is incorrect.

You are right. It should be --module. But it is a wrong option anyway.

thank you for your feedback