Getting build error

[mingfang]

[ERROR] Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.5 from/to nexus (http://maven.shuttercorp.net/nexus/content/groups/public): maven.shuttercorp.net: Name or service not known: Unknown host maven.shuttercorp.net: Name or service not known -> [Help 1]