Calendar plugin cannot be get from ivy
I guess there is a configuration problem, see Jenkins console.
Calendar plugins seems to be build in dashboard :

[ivy:publish] :: publishing :: org.ametys.plugins#dashboard
[ivy:publish] published ametys-plugin-calendar to /srv/jenkins/ametys/.jenkins/jobs/_tool-Ivyrep/workspace/ivyrep/ametys-products/nightly/org.ametys.plugins/dashboard/1.1.x/1.1.0.20121011-0443-b5-SNAPSHOT/jars/ametys-plugin-calendar-1.1.0.20121011-0443-b5-SNAPSHOT.jar
[ivy:publish] published ametys-plugin-calendar-resources to /srv/jenkins/ametys/.jenkins/jobs/_tool-Ivyrep/workspace/ivyrep/ametys-products/nightly/org.ametys.plugins/dashboard/1.1.x/1.1.0.20121011-0443-b5-SNAPSHOT/jars/ametys-plugin-calendar-resources-1.1.0.20121011-0443-b5-SNAPSHOT.jar
[ivy:publish] published ametys-plugin-calendar-resources to /srv/jenkins/ametys/.jenkins/jobs/_tool-Ivyrep/workspace/ivyrep/ametys-products/nightly/org.ametys.plugins/dashboard/1.1.x/1.1.0.20121011-0443-b5-SNAPSHOT/resources/ametys-plugin-calendar-resources-1.1.0.20121011-0443-b5-SNAPSHOT.zip
[ivy:publish] published ivy to /srv/jenkins/ametys/.jenkins/jobs/_tool-Ivyrep/workspace/ivyrep/ametys-products/nightly/org.ametys.plugins/dashboard/1.1.x/1.1.0.20121011-0443-b5-SNAPSHOT/ivy.xml