Ant + GWT compiling two related projects - gwt

Question

I have a problem with using Ant to compile a GWT project which is split into two parts. First project which is GWT project- client side of a web app and the second project included in build path which is a data model for hibernate. When I'm runing a build.xml I'm geting errors that I forget to inherit some modules. Where should I include my second project? in javac? project.classpath? libs?
I'm using standard build.xml example from GWT showcase:
<?xml version="1.0" encoding="utf-8" ?>
<project name="Showcase" default="build" basedir=".">
<!-- Arguments to gwtc and devmode targets -->
<property name="gwt.args" value="" />
<!-- Configure path to GWT SDK -->
<property name="gwt.sdk" location="../.." />
<path id="project.class.path">
<pathelement location="war/WEB-INF/classes"/>
<pathelement location="${gwt.sdk}/gwt-user.jar"/>
<fileset dir="${gwt.sdk}" includes="gwt-dev*.jar"/>
<!-- Add any additional non-server libs (such as JUnit) -->
<fileset dir="war/WEB-INF/lib" includes="**/*.jar"/>
</path>
<target name="libs" description="Copy libs to WEB-INF/lib">
<mkdir dir="war/WEB-INF/lib" />
<copy todir="war/WEB-INF/lib" file="${gwt.sdk}/gwt-servlet.jar" />
<copy todir="war/WEB-INF/lib" file="${gwt.sdk}/gwt-servlet-deps.jar" />
<!-- Add any additional server libs that need to be copied -->
</target>
<target name="javac" depends="libs" description="Compile java source to bytecode">
<mkdir dir="war/WEB-INF/classes"/>
<javac srcdir="src" includes="**" encoding="utf-8"
destdir="war/WEB-INF/classes"
source="1.5" target="1.5" nowarn="true"
debug="true" debuglevel="lines,vars,source">
<classpath refid="project.class.path"/>
</javac>
<copy todir="war/WEB-INF/classes">
<fileset dir="src" excludes="**/*.java"/>
</copy>
</target>
<target name="gwtc" depends="javac" description="GWT compile to JavaScript (production mode)">
<java failonerror="true" fork="true" classname="com.google.gwt.dev.Compiler">
</java>
</target>
<target name="devmode" depends="javac" description="Run development mode">
<java failonerror="true" fork="true" classname="com.google.gwt.dev.DevMode">
<classpath>
<pathelement location="src"/>
<path refid="project.class.path"/>
<pathelement location="../../validation-api-1.0.0.GA.jar" />
<pathelement location="../../validation-api-1.0.0.GA-sources.jar" />
</classpath>
<jvmarg value="-Xmx256M"/>
<arg value="-startupUrl"/>
<arg value="Showcase.html"/>
<arg line="-war"/>
<arg value="war"/>
<!-- Additional arguments like -style PRETTY or -logLevel DEBUG -->
<arg line="${gwt.args}"/>
<arg value="com.google.gwt.sample.showcase.Showcase"/>
</java>
</target>
<target name="superdevmode" depends="javac" description="Run Super Dev Mode">
<java failonerror="true" fork="true" classname="com.google.gwt.dev.codeserver.CodeServer">
<classpath>
<pathelement location="src"/>
<pathelement location="../../gwt-codeserver.jar" />
<path refid="project.class.path"/>
<pathelement location="../../validation-api-1.0.0.GA.jar" />
<pathelement location="../../validation-api-1.0.0.GA-sources.jar" />
</classpath>
<jvmarg value="-Xmx256M"/>
<arg value="com.google.gwt.sample.showcase.Showcase"/>
</java>
</target>
<target name="eclipse.generate" depends="libs" description="Generate eclipse project">
<java failonerror="true" fork="true" classname="com.google.gwt.user.tools.WebAppCreator">
<classpath>
<path refid="project.class.path"/>
</classpath>
<arg value="-XonlyEclipse"/>
<arg value="-ignore"/>
<arg value="com.google.gwt.sample.showcase.Showcase"/>
</java>
</target>
<target name="hosted" depends="devmode" description="Run development mode (NOTE: the 'hosted' target is deprecated)" />
<target name="build" depends="gwtc" description="Build this project" />
<target name="war" depends="build" description="Create a war file">
<zip destfile="Showcase.war" basedir="war"/>
</target>
<target name="clean" description="Cleans this project">
<delete dir="war/WEB-INF/classes" failonerror="false" />
<delete dir="war/showcase" failonerror="false" />
</target>
</project>