Build tasks are using default system charset which under windows can differ (in my case it was cp1451). As there are UTF-8 characters in sourcecode build is failing.
It is better to not rely on system defaults in build descriptors.

There is another problem with build on windows causing error message:

[metadata-parser] Generating Interface: Connector
[metadata-parser] Error at xsl:result-document on line 237 of :
[metadata-parser] Resolved URL is malformed: unknown protocol: c

This is caused by bug in ShrinkWrap which has been fixed in 2.0.0-alpha-5.