diff --git a/module_build_service/builder.py b/module_build_service/builder.py
index efb83fd2..16c46b9b 100644
--- a/module_build_service/builder.py
+++ b/module_build_service/builder.py
@@ -469,7 +469,7 @@ chmod 644 %buildroot/%_rpmconfigdir/macros.d/macros.modules
         log.info("%r buildroot sucessfully connected." % self)
 
     def buildroot_add_repos(self, dependencies):
-        tags = [self._get_tag(d)['name'] for d in dependencies]
+        tags = [self._get_tag("module-" + d)['name'] for d in dependencies]
         log.info("%r adding deps on %r" % (self, tags))
         self._koji_add_many_tag_inheritance(self.module_build_tag, tags)