need solution for the below error

[suvya]

Unresolveable build extension: Plugin com.day.jcr.vault:content-package-maven-plugin:0.5.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for com.day.jcr.vault:content-package-maven-plugin:jar:0.5.1 @
[ERROR] Unknown packaging: content-package @ line 34, column 16
[ERROR] Unresolveable build extension: Plugin com.day.jcr.vault:content-package-maven-plugin:0.5.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for com.day.jcr.vault:content-package-maven-plugin:jar:0.5.1 @
[ERROR] Unknown packaging: content-package @ line 34, column 16

[Bernd Alheit]

Where does you get the error in Adobe Acrobat?