diff --git a/build.gradle b/build.gradle
index aaccc5da..2001d544 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 import org.gradle.internal.jvm.Jvm
 import org.apache.tools.ant.util.TeeOutputStream
-boolean debug = false 
+boolean debug = false
 
 class Tags {
     Boolean hasMainMethod = false
@@ -205,7 +205,7 @@ configure(subprojects - project(':onjava')) {
     }
 }
 
-task verify(type:Exec) {
+task verify(type:Exec) << {
     println("execute 'gradlew run' first")
     commandLine 'python', 'verify_output.py'
 }