-diffignore PACKAGE-SPEC ( ',' PACKAGE-SPEC ) *

				// We might have some other projects we want build
				// before we do anything, but these projects are not in
				// our path. The -dependson allows you to build them before.
				// The values are possibly negated globbing patterns.

				// dependencies.add( getWorkspace().getProject("cnf"));

				String dp = getProperty(Constants.DEPENDSON);
				Set<String> requiredProjectNames = new LinkedHashSet<String>(new Parameters(dp).keySet());

				// Allow DependencyConstributors to modify
				// requiredProjectNames
				List<DependencyContributor> dcs = getPlugins(DependencyContributor.class);
				for (DependencyContributor dc : dcs)
					dc.addDependencies(this, requiredProjectNames);

				Instructions is = new Instructions(requiredProjectNames);

				Set<Instruction> unused = new HashSet<Instruction>();
				Collection<Project> projects = getWorkspace().getAllProjects();
				Collection<Project> dependencies = is.select(projects, unused, false);

				for (Instruction u : unused)
					msgs.MissingDependson_(u.getInput());