[M2] xwiki-enterprise-database build problem

Hello. I have a strange bug then building xwiki-enterprise-database by maven2 indirectly (by pom <modules>): $ cd xwiki-product-enterprise $ mvn clean; mvn install result: database files in xwiki-product-enterprise/target/database but not in xwiki-product-enterprise/database/target/database so xwiki-enterprise-database-1.1-SNAPSHOT-hsqldb.zip is empty (if I directly building database (`cd xwiki-product-enterprise/database; mvn install;`) - all is fine) environment: maven-2.1-SNAPSHOT(29 june) sun-jdk-1.6 xwiki trank (29 june), unchanged gentoo linux all configs looks normally I looked all configs, looked at mvn -X and found nothing strange. I created simple m2 project like xwiki-product-enterprise but with only the database as m2 module - the same error. Why it can be? -- Artem Melentyev