Build failure Lucee Java returned: 1

i was trying to build Lucee from source following the official guide.
I started the build with mvn clean install command and after some times and a lot of test i get this error:

[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  41:58 min
[INFO] Finished at: 2019-04-11T11:22:20+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.8:run (ant-magic) on project lucee: An Ant BuildException has occured: The following error occurred while executing this line:
[ERROR] C:\lucee_source\Lucee\ant\build-core.xml:1037: Java returned: 1
[ERROR] around Ant part ...<ant antfile="../ant/build-core.xml" target="buildLoaderMaven"/>... @ 15:67 in C:\lucee_source\Lucee\loader\target\antrun\build-main.xml
[ERROR] -> [Help 1]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1]

try it with ant command.
hopefully it will work

and i think you ant is not on your system…