diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java
index 5e93da4ecb7..00cb81608b9 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java
@@ -19,16 +19,19 @@ package org.jetbrains.kotlin.codegen;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiFile;
 import kotlin.collections.CollectionsKt;
+import kotlin.io.FilesKt;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.annotations.TestOnly;
 import org.jetbrains.kotlin.backend.common.output.OutputFile;
 import org.jetbrains.kotlin.backend.common.output.OutputFileCollection;
 import org.jetbrains.kotlin.codegen.state.GenerationState;
+import org.jetbrains.kotlin.load.kotlin.ModuleMapping;
 import org.jetbrains.kotlin.load.kotlin.PackagePartClassUtils;
 import org.jetbrains.kotlin.load.kotlin.PackageParts;
 import org.jetbrains.kotlin.name.FqName;
 import org.jetbrains.kotlin.psi.KtFile;
+import org.jetbrains.kotlin.resolve.CompilerDeserializationConfiguration;
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin;
 import org.jetbrains.kotlin.serialization.jvm.JvmPackageTable;
 import org.jetbrains.org.objectweb.asm.Type;
@@ -143,8 +146,26 @@ public class ClassFileFactory implements OutputFileCollection {
         StringBuilder answer = new StringBuilder();
 
         for (OutputFile file : asList()) {
-            answer.append("@").append(file.getRelativePath()).append('\n');
-            answer.append(file.asText());
+            File relativePath = new File(file.getRelativePath());
+            answer.append("@").append(relativePath).append('\n');
+            switch (FilesKt.getExtension(relativePath)) {
+                case "class":
+                    answer.append(file.asText());
+                    break;
+                case "kotlin_module": {
+                    ModuleMapping mapping = ModuleMapping.Companion.create(
+                            file.asByteArray(), relativePath.getPath(), CompilerDeserializationConfiguration.Default.INSTANCE
+                    );
+                    for (Map.Entry<String, PackageParts> entry : mapping.getPackageFqName2Parts().entrySet()) {
+                        FqName packageFqName = new FqName(entry.getKey());
+                        PackageParts packageParts = entry.getValue();
+                        answer.append("<package ").append(packageFqName).append(": ").append(packageParts.getParts()).append(">\n");
+                    }
+                    break;
+                }
+                default:
+                    throw new UnsupportedOperationException("Unknown OutputFile: " + file);
+            }
         }
 
         return answer.toString();