diff --git a/bootstrapvz/common/tasks/packages.py b/bootstrapvz/common/tasks/packages.py
index 662ae11..403a31c 100644
--- a/bootstrapvz/common/tasks/packages.py
+++ b/bootstrapvz/common/tasks/packages.py
@@ -7,6 +7,7 @@ from ..tools import log_check_call
 class AddManifestPackages(Task):
 	description = 'Adding packages from the manifest'
 	phase = phases.preparation
+	predecessors = [apt.AddManifestSources, apt.AddDefaultSources, apt.AddBackports]
 
 	@classmethod
 	def run(cls, info):