You should probably remove the scalaVersion tag as the warning says. "Since version 2.7 of the plugin, the scala version to use is detected from dependency to scala-library. So it suggested to not use scalaVersion configuration"

Next try mvn -X clean install the x will take maven into debug mode and add more info to logs, please post those logs


Can you try setting maven compiler version to 2.3.2 (the latest version) as of date? Wondering if you are seeing this issue, which got fixed in 2.3.2.

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