diff --git a/platform/build-scripts/src/org/jetbrains/intellij/build/ProductProperties.kt b/platform/build-scripts/src/org/jetbrains/intellij/build/ProductProperties.kt
index f6efb2bda465..b3278286f4a8 100644
--- a/platform/build-scripts/src/org/jetbrains/intellij/build/ProductProperties.kt
+++ b/platform/build-scripts/src/org/jetbrains/intellij/build/ProductProperties.kt
@@ -338,7 +338,7 @@ abstract class ProductProperties {
    * Paths to externally built plugins to be included in the IDE.
    * They will be copied into the build, as well as included in the IDE classpath when launching it to build search index, .jar order, etc.
    */
-  open fun getAdditionalPluginPaths(context: BuildContext): List<Path> = emptyList()
+  open suspend fun getAdditionalPluginPaths(context: BuildContext): List<Path> = emptyList()
 
   /**
    * Override this function to provide additional JVM command line arguments which will be added to launchers along with 
diff --git a/platform/build-scripts/src/org/jetbrains/intellij/build/productRunner/IntellijProcessStarter.kt b/platform/build-scripts/src/org/jetbrains/intellij/build/productRunner/IntellijProcessStarter.kt
index ab3656eabdc9..b04a503d28d4 100644
--- a/platform/build-scripts/src/org/jetbrains/intellij/build/productRunner/IntellijProcessStarter.kt
+++ b/platform/build-scripts/src/org/jetbrains/intellij/build/productRunner/IntellijProcessStarter.kt
@@ -100,7 +100,7 @@ suspend fun runApplicationStarter(
   }
 }
 
-private fun prepareFlatClasspath(classpath: Collection<String>, tempDir: Path, context: BuildContext): LinkedHashSet<String> {
+private suspend fun prepareFlatClasspath(classpath: Collection<String>, tempDir: Path, context: BuildContext): LinkedHashSet<String> {
   val effectiveIdeClasspath = LinkedHashSet(classpath)
 
   val additionalPluginPaths = context.productProperties.getAdditionalPluginPaths(context)