I try to inject last successfull build revision into env vars with Groovy script. It runs successfully in Jenkins execution console, but fails inside job run(Mercurial plugin need to be installed.)

[jenkins] $ cmd /c call C:\Windows\TEMP\hudson5593478547391954761.bat
C:\Dev\HG\jenkins>exit 0
[EnvInject] - Script executed successfully.
[EnvInject] - Evaluation the following Groovy script content:
import hudson.plugins.mercurial.MercurialTagAction

def lastStableBuild = Jenkins.instance.getItem($JOB_NAME).getLastStableBuild()
if (lastStableBuild == null){
return null;
}

def mercurialAction = lastStableBuild.getAction(MercurialTagAction)
if (mercurialAction == null){
return null;
}
def lastSuccessRev = [LAST_SUCCESS_REVISION: mercurialAction.getRev()]
return lastSuccessRev

[EnvInject] - [ERROR] - SEVERE ERROR occurs: startup failed:
Script1.groovy: 1: unable to resolve class hudson.plugins.mercurial.MercurialTagAction
@ line 1, column 1.
import hudson.plugins.mercurial.MercurialTagAction
^

1 error