It might happen, that you depend on an artifact that depends on some artifact for that no pom is available. This is (right now) e.g. the case for spring-2.5.6: this depends on javax.ejb.ejb-3.0, whereas only javax.ejb.ejb-api-3.0 is available in the repos.
In such a case (the mentioned pom has no deps itself) you might want to create such a pom from within your buildfile:
def create_pom(art) artifact art do |a| if !File.exist?(a.name) # Create the directory mkdir_p File.dirname(a.name) # Create and write the pom file File.open a.name, "w" do |f| f.write <<-XML <project> <modelVersion>4.0.0</modelVersion> <groupId>#{a.group}</groupId> <artifactId>#{a.id}</artifactId> <version>#{a.version}</version> </project> XML end end end end # Now use it: create_pom 'javax.ejb:ejb:pom:3.0'