libmaven-install-plugin-java is not installed properly

[mgmechanics]

Binary package hint: libmaven-install-plugin-java

$ mvn -U org.apache.maven.plugins:maven-scala-plugin

gives me:

[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'org.apache.maven.plugins'.
[INFO] org.apache.maven.plugins: checking for updates from central
[INFO] org.codehaus.mojo: checking for updates from central
[INFO] artifact org.apache.maven.plugins:maven-org.apache.maven.plugins-plugin: checking for updates from central
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] The plugin 'org.apache.maven.plugins:maven-org.apache.maven.plugins-plugin' does not exist or no valid version could be found
[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 13 seconds
[INFO] Finished at: Wed Dec 22 21:42:24 CET 2010
[INFO] Final Memory: 1M/59M
[INFO] ------------------------------------------------------------------------

??? I already installed the package "libmaven-install-plugin-java", why does it say:
"The plugin 'org.apache.maven.plugins:maven-org.apache.maven.plugins-plugin' does not exist or no valid version could be found"???

Synaptic shows me:
...
/usr/share/java/maven-install-plugin-2.3.jar
/usr/share/java/maven-install-plugin.jar
...
/usr/share/maven-repo/org/apache/maven/plugins/maven-install-plugin/2.3/maven-install-plugin-2.3.jar
/usr/share/maven-repo/org/apache/maven/plugins/maven-install-plugin/2.3/maven-install-plugin-2.3.pom

Do i need a link to
/usr/share/maven-repo/org/apache/maven/plugins/maven-install-plugin/maven-install-plugin.jar
/usr/share/maven-repo/org/apache/maven/plugins/maven-install-plugin/maven-install-plugin.pom
??

[mgmechanics (mgmechanics)]

This is not a problem with the ubuntu-package but a misleading error message of maven. "The plugin 'org.apache.maven.plugins:maven-org.apache.maven.plugins-plugin' does not exist or no valid version could be found" means that
 - maven could not access to that repository (typo in the adress, proxy problems ...)
 - there is no pom.xml in the actual folder: build a pom.xml or change into the folder there the pom.xml is.