diff --git a/gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspSubplugin.kt b/gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspSubplugin.kt
index c3612141da..3994bb4824 100644
--- a/gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspSubplugin.kt
+++ b/gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspSubplugin.kt
@@ -116,6 +116,7 @@ class KspGradleSubplugin @Inject internal constructor(private val registry: Tool
             kspTask.mapClasspath { kotlinCompileProvider.get().classpath }
             kspTask.options = options
             kspTask.outputs.dirs(kotlinOutputDir, javaOutputDir, classOutputDir)
+            kspTask.dependsOn(kspConfiguration.buildDependencies)
         }.apply {
             configure {
                 kotlinCompilation.allKotlinSourceSets.forEach { sourceSet -> it.source(sourceSet.kotlin) }