Maven 2 project with automatic Clover integration can't find Clover

My plan fails as follows:

[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Failed to resolve artifact.

Missing:
----------
1) com.cenqua.clover:clover:jar:2.6.2

Try downloading the file manually from the project website.

Then, install it using the command:
mvn install:install-file -DgroupId=com.cenqua.clover -DartifactId=clover -Dversion=2.6.2 -Dpackaging=jar -Dfile=/path/to/file

Alternatively, if you host your own repository you can deploy the file there:
mvn deploy:deploy-file -DgroupId=com.cenqua.clover -DartifactId=clover -Dversion=2.6.2 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

Path to dependency:
1) com.atlassian.maven.plugins:maven-clover2-plugin:maven-plugin:2.6.2-r2
2) com.cenqua.clover:clover:jar:2.6.2

----------
1 required artifact is missing.

for artifact:
com.atlassian.maven.plugins:maven-clover2-plugin:maven-plugin:2.6.2-r2

from the specified remote repositories:
central (http://repo1.maven.org/maven2)

There is no settings.xml in effect, and no mention of Clover in any of my POMs.