diff --git a/source/dub/dependencyresolver.d b/source/dub/dependencyresolver.d
index 6807295..9038184 100644
--- a/source/dub/dependencyresolver.d
+++ b/source/dub/dependencyresolver.d
@@ -133,7 +133,7 @@
 				// get the current config/version of the current dependency
 				sizediff_t childidx = package_indices[basepack];
 				if (all_configs[childidx] == [CONFIG.invalid]) {
-					enforce(parentbase != root_base_pack, format("Root package %s contains reference to invalid package %s", parent.pack, ch.pack));
+					enforce(parentbase != root_base_pack, format("Root package %s contains reference to invalid package %s %s", parent.pack, ch.pack, ch.configs));
 					// choose another parent config to avoid the invalid child
 					if (parentidx > maxcpi) {
 						error = format("Package %s contains invalid dependency %s", parent.pack, ch.pack);