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<p>The maven-antrun-plugin runs ant with JAVA_HOME set to the jre subdirectory of the JDK, even if the JAVA_HOME for the overall run is a JDK.</p>

<p> There is documentation elsewhere about how to create a dependency at the project level for the JDK's tools.jar, but this does not help out antrun, which is a plugin.</p>

<p> The following profile does the job. The '..' in the path hauls up past the 'jre' directory to the lib directory.</p>

<p>The present author got into this pickle by building out a project on a Mac, where there is no separate tools.jar, and then having the resulting build fail on a hudson instance on Linux.
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  &lt;profiles>
        &lt;profile>
            &lt;id>tools.jar&lt;/id>
            &lt;activation>
                &lt;property>
                    &lt;name>java.vendor&lt;/name>
                    &lt;value>Sun Microsystems Inc.&lt;/value>
                &lt;/property>
            &lt;/activation>
            &lt;build>
              &lt;plugins>
              &lt;plugin>
                &lt;groupId>org.apache.maven.plugins&lt;/groupId>
                &lt;artifactId>maven-antrun-plugin&lt;/artifactId>
                &lt;dependencies>
                  &lt;dependency>
                    &lt;groupId>com.sun&lt;/groupId>
                    &lt;artifactId>tools&lt;/artifactId>
                    &lt;version>1.5.0&lt;/version>
                    &lt;scope>system&lt;/scope>
                    &lt;systemPath>${java.home}/../lib/tools.jar&lt;/systemPath>
                  &lt;/dependency>
                &lt;/dependencies>
              &lt;/plugin>
              &lt;/plugins>
            &lt;/build>
        &lt;/profile>
</pre></td></tr></table>