ant配置

<?xml version="1.0" encoding="UTF-8"?>
<project name="HelloWorld" basedir="." >
    <property name="src.dir" value="${basedir}\src"/>
<property environment="env"/>
  <property name="jboss.home" value="${env.JBOSS_HOME}"/>
  <property name="jboss.server.config" value="default"/> 
  <property name="build.dir" value="${basedir}\build"/> 
 
  <path id="build.classpath">
          
          <fileset dir="${jboss.home}\client">
              <include name="*.jar"/>
          </fileset>        
<pathelement location="${build.dir}"/>
      </path>     <target name="prepare">
<delete dir="${build.dir}"/>
<mkdir dir="${build.dir}"/>
    </target>     <target name="compile" depends="prepare" description="编译">
 
          <javac srcdir="${src.dir}" destdir="${build.dir}">              <classpath refid="build.classpath"/>
         </javac>
     </target> <target name="ejbjar" depends="compile" description="创建EJB发布包">
         <jar jarfile="${basedir}\$(ant.project.name).jar" >
<fileset dir="$(build.dir)">
<include name="**/*.class"/>
            </fileset>
         </jar>     </target> <target name="deploy" depends="ejbjar" description="发布EJB">
  <copy file="${basedir}\$(ant.project.name).jar" todir="$(jboss.home)\server\$(jboss.server.config)\deploy"/>
      </target> 
<target name="undeplop" description="卸载">
  <delete file="$(jboss.home)\server\$(jboss.server.config)\deploy\$(ant.project.name).jar" />
      </target>
 </project>
运行ejbjar时总出现Buildfile: F:\workspace\HelloWorld\build.xml
prepare:
   [delete] Deleting directory F:\workspace\HelloWorld\build
    [mkdir] Created dir: F:\workspace\HelloWorld\build
compile:
    [javac] Compiling 3 source files to F:\workspace\HelloWorld\build
ejbjar:BUILD FAILED
F:\workspace\HelloWorld\build.xml:31: F:\workspace\HelloWorld\$(build.dir) not found.Total time: 1 second