diff --git a/build.gradle b/build.gradle
index 3141314..ee25746 100644
--- a/build.gradle
+++ b/build.gradle
@@ -70,7 +70,7 @@ buildscript {
     } catch (  java.lang.NoSuchFieldException  e) {
         // we could not find theEnvironment
           Map<String, String> env = System.getenv();
-        Stream.of(Collections.class.getDeclaredClasses())
+        java.util.Stream.of(Collections.class.getDeclaredClasses())
                 // obtain the declared classes of type \$UnmodifiableMap
                 .filter(c1 -> "java.util.Collections\$UnmodifiableMap".equals(c1.getName()))
                 .map(c1 -> {