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msridhar · msridhar · commit 6ba4d7ea931e · 2025-10-18T18:31:52.000-07:00
diff --git a/build.gradle b/build.gradle
@@ -42,7 +42,14 @@ repositories {
 
 apply from: "gradle/dependencies.gradle"
 
-if (JavaVersion.current() == JavaVersion.VERSION_21) {
+def currentJavaVersion = JavaVersion.current()
+if (!currentJavaVersion.isCompatibleWith(JavaVersion.VERSION_21)) {
+    throw new GradleException(
+    "NullAway only builds on JDK 21 or higher now. Detected ${System.getProperty('java.version')}. Please upgrade to JDK 21 or later."
+    )
+}
+
+if (currentJavaVersion == JavaVersion.VERSION_21) {
     def runtimeVersion = Runtime.version()
     if (runtimeVersion.feature() == 21 && runtimeVersion.update() < 8) {
         throw new GradleException(
@@ -129,7 +136,7 @@ spotless {
     groovyGradle {
         target '**/*.gradle'
         greclipse()
-        indentWithSpaces(4)
+        leadingTabsToSpaces(4)
         trimTrailingWhitespace()
         endWithNewline()
     }
