diff --git a/build_resolvers/CHANGELOG.md b/build_resolvers/CHANGELOG.md
index 9cc9b35a8..d98d84205 100644
--- a/build_resolvers/CHANGELOG.md
+++ b/build_resolvers/CHANGELOG.md
@@ -1,3 +1,5 @@
+## 2.0.7-dev
+
 ## 2.0.6
 
 - Allow the latest analyzer.
diff --git a/build_resolvers/lib/src/resolver.dart b/build_resolvers/lib/src/resolver.dart
index 2a23443ec..8f4feba46 100644
--- a/build_resolvers/lib/src/resolver.dart
+++ b/build_resolvers/lib/src/resolver.dart
@@ -83,6 +83,7 @@ class PerActionResolver implements ReleasableResolver {
     await for (final library in libraries) {
       if (library.name == libraryName) return library;
     }
+    return null;
   }
 
   @override
diff --git a/build_resolvers/pubspec.yaml b/build_resolvers/pubspec.yaml
index 17dec33b2..5eafa3ce0 100644
--- a/build_resolvers/pubspec.yaml
+++ b/build_resolvers/pubspec.yaml
@@ -1,5 +1,5 @@
 name: build_resolvers
-version: 2.0.6
+version: 2.0.7-dev
 description: Resolve Dart code in a Builder
 repository: https://github.com/dart-lang/build/tree/master/build_resolvers