Executing groovy scripts on Jenkins' slaves
<p>I'm trying to execute a simple groovy script on Jenkins' slaves using the Groovy plugin.
I'm using the <strong>execute groovy script</strong> option and <strong>not</strong> the <strong>execute system groovy script option</strong>. I'm also using the "install automatically" (install from groovy website) option of the plugin of the latest version(2.4.6) . However, the job fails and I'm getting this:</p>

<pre><code>Building remotely on .... (...) in workspace C:\Jenkins_Slave\workspace\...
Unpacking https://dl.bintray.com/groovy/maven/apache-groovy-binary-2.4.6.zip to C:\Jenkins_Slave\tools\hudson.plugins.groovy.GroovyInstallation\groovy_2_4_6 on ...
[groovy_reset_dead_slave] $ C:\Jenkins_Slave\tools\hudson.plugins.groovy.GroovyInstallation\groovy_2_4_6\bin\groovy.bat C:\Jenkins_Slave\workspace\...\hudson5850644430171226650.groovy
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
C:\Jenkins_Slave\workspace\...\hudson5850644430171226650.groovy: 5: unable to resolve class jenkins.model.Jenkins
 @ line 5, column 1.
   import jenkins.model.Jenkins
   ^

1 error

Build step 'Execute Groovy script' marked build as failure
Finished: FAILURE
</code></pre>

<p>How can I overcome this issue and make it work properly?</p>