added  ignore: uri_does_not_exist workaround for conditional imports and old analyzer bug.
diff --git a/lib/src/sha512.dart b/lib/src/sha512.dart
index 45a4ac2..bbea817 100644
--- a/lib/src/sha512.dart
+++ b/lib/src/sha512.dart
@@ -6,6 +6,9 @@
 
 import 'digest.dart';
 import 'hash.dart';
+// The below comment is a workaround for an old analyzer error. It goes away
+// with ddk.
+// ignore: uri_does_not_exist
 import 'sha512_fastsinks.dart' if (dart.library.js) 'sha512_slowsinks.dart';
 //import 'sha512_slowsinks.dart';
 import 'utils.dart';