diff --git a/analysis/analysis-api-standalone/src/org/jetbrains/kotlin/analysis/project/structure/builder/KtSourceModuleBuilder.kt b/analysis/analysis-api-standalone/src/org/jetbrains/kotlin/analysis/project/structure/builder/KtSourceModuleBuilder.kt
index 9234300bb58..6c8339e502d 100644
--- a/analysis/analysis-api-standalone/src/org/jetbrains/kotlin/analysis/project/structure/builder/KtSourceModuleBuilder.kt
+++ b/analysis/analysis-api-standalone/src/org/jetbrains/kotlin/analysis/project/structure/builder/KtSourceModuleBuilder.kt
@@ -11,6 +11,7 @@ import com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.analysis.project.structure.KtSourceModule
 import org.jetbrains.kotlin.analysis.project.structure.impl.KtSourceModuleImpl
 import org.jetbrains.kotlin.analysis.project.structure.impl.collectSourceFilePaths
+import org.jetbrains.kotlin.analysis.project.structure.impl.hasSuitableExtensionToAnalyse
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreProjectEnvironment
 import org.jetbrains.kotlin.config.ApiVersion
 import org.jetbrains.kotlin.config.LanguageVersion
@@ -62,10 +63,10 @@ public class KtSourceModuleBuilder(
         val localFileSystem = kotlinCoreProjectEnvironment.environment.localFileSystem
         return buildList {
             for (root in sourceRoots) {
-                val files = if (root.isDirectory()) {
-                    collectSourceFilePaths(root)
-                } else {
-                    listOf(root)
+                val files = when {
+                    root.isDirectory() -> collectSourceFilePaths(root)
+                    root.hasSuitableExtensionToAnalyse() -> listOf(root)
+                    else -> emptyList()
                 }
                 for (file in files) {
                     val virtualFile = localFileSystem.findFileByIoFile(file.toFile()) ?: continue
diff --git a/analysis/analysis-api-standalone/src/org/jetbrains/kotlin/analysis/project/structure/impl/KtModuleUtils.kt b/analysis/analysis-api-standalone/src/org/jetbrains/kotlin/analysis/project/structure/impl/KtModuleUtils.kt
index 64ea9e46018..48a21aa00c7 100644
--- a/analysis/analysis-api-standalone/src/org/jetbrains/kotlin/analysis/project/structure/impl/KtModuleUtils.kt
+++ b/analysis/analysis-api-standalone/src/org/jetbrains/kotlin/analysis/project/structure/impl/KtModuleUtils.kt
@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.analysis.project.structure.impl
 
-import com.google.common.io.Files.getFileExtension
 import com.intellij.ide.highlighter.JavaFileType
 import com.intellij.psi.PsiFileSystemItem
 import com.intellij.psi.PsiManager
@@ -37,6 +36,7 @@ import org.jetbrains.kotlin.wasm.resolve.WasmJsPlatformAnalyzerServices
 import java.io.IOException
 import java.nio.file.*
 import java.nio.file.attribute.BasicFileAttributes
+import kotlin.io.path.extension
 
 internal fun TargetPlatform.getAnalyzerServices(): PlatformDependentAnalyzerServices {
     return when {
@@ -101,11 +101,7 @@ internal fun collectSourceFilePaths(root: Path): List<Path> {
             override fun visitFile(file: Path, attrs: BasicFileAttributes): FileVisitResult {
                 if (!Files.isRegularFile(file) || !Files.isReadable(file))
                     return FileVisitResult.CONTINUE
-                val ext = getFileExtension(file.fileName.toString())
-                if (ext == KotlinFileType.EXTENSION ||
-                    ext == KotlinParserDefinition.STD_SCRIPT_SUFFIX ||
-                    ext == JavaFileType.DEFAULT_EXTENSION
-                ) {
+                if (file.hasSuitableExtensionToAnalyse()) {
                     result.add(file)
                 }
                 return FileVisitResult.CONTINUE
@@ -123,6 +119,14 @@ internal fun collectSourceFilePaths(root: Path): List<Path> {
     return result
 }
 
+internal fun Path.hasSuitableExtensionToAnalyse(): Boolean {
+    val extension = extension
+
+    return extension == KotlinFileType.EXTENSION ||
+            extension == KotlinParserDefinition.STD_SCRIPT_SUFFIX ||
+            extension == JavaFileType.DEFAULT_EXTENSION
+}
+
 internal inline fun <reified T : PsiFileSystemItem> getPsiFilesFromPaths(
     kotlinCoreProjectEnvironment: KotlinCoreProjectEnvironment,
     paths: Collection<Path>,