diff --git a/spark/build.gradle b/spark/build.gradle
index a7a76e3555..8dce05e05d 100644
--- a/spark/build.gradle
+++ b/spark/build.gradle
@@ -14,7 +14,7 @@ repositories {
     mavenCentral()
 }
 
-tasks.register('downloadG4Files', Exec) {
+tasks.register('downloadG4Files') {
     description = 'Download remote .g4 files from GitHub'
 
     // use doLast to wait the completion of command execution
@@ -27,6 +27,11 @@ tasks.register('downloadG4Files', Exec) {
             args '-o', 'src/main/antlr/SqlBaseParser.g4', 'https://raw.githubusercontent.com/apache/spark/master/sql/api/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBaseParser.g4'
             args '-o', 'src/main/antlr/SqlBaseLexer.g4', 'https://raw.githubusercontent.com/apache/spark/master/sql/api/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBaseLexer.g4'
         }
+        project.exec {
+            executable 'ls'
+
+            args '-l', 'src/main/antlr/'
+        }
     }
 }
 clean.delete fileTree('src/main/antlr/') { include '*.g4' }
@@ -45,8 +50,6 @@ configurations {
 // Make sure the downloadG4File task runs before the generateGrammarSource task
 generateGrammarSource.dependsOn downloadG4Files
 
-compileJava.dependsOn generateGrammarSource
-
 dependencies {
     antlr "org.antlr:antlr4:4.7.1"