diff --git a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/components/KtFirCompilerFacility.kt b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/components/KtFirCompilerFacility.kt
index 69779a2a3f0..bf77fee8127 100644
--- a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/components/KtFirCompilerFacility.kt
+++ b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/components/KtFirCompilerFacility.kt
@@ -144,7 +144,8 @@ internal class KtFirCompilerFacility(
             linkViaSignatures = false,
             effectiveConfiguration[CommonConfigurationKeys.EVALUATED_CONST_TRACKER] ?: EvaluatedConstTracker.create(),
             effectiveConfiguration[CommonConfigurationKeys.INLINE_CONST_TRACKER],
-            allowNonCachedDeclarations = true
+            allowNonCachedDeclarations = true,
+            useIrFakeOverrideBuilder = effectiveConfiguration.getBoolean(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER),
         )
 
         val fir2IrResult = Fir2IrConverter.createIrModuleFragment(
diff --git a/compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArgumentsCopyGenerated.kt b/compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArgumentsCopyGenerated.kt
index b054e02d0cb..2fbc1f857d8 100644
--- a/compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArgumentsCopyGenerated.kt
+++ b/compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArgumentsCopyGenerated.kt
@@ -82,6 +82,7 @@ fun copyCommonCompilerArguments(from: CommonCompilerArguments, to: CommonCompile
     to.useFirExtendedCheckers = from.useFirExtendedCheckers
     to.useFirIC = from.useFirIC
     to.useFirLT = from.useFirLT
+    to.useIrFakeOverrideBuilder = from.useIrFakeOverrideBuilder
     to.useK2 = from.useK2
     to.useMixedNamedArguments = from.useMixedNamedArguments
     to.verbosePhases = from.verbosePhases?.copyOf()
diff --git a/compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/K2NativeCompilerArgumentsCopyGenerated.kt b/compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/K2NativeCompilerArgumentsCopyGenerated.kt
index e5aa6d4d64d..0a402a96c4c 100644
--- a/compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/K2NativeCompilerArgumentsCopyGenerated.kt
+++ b/compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/K2NativeCompilerArgumentsCopyGenerated.kt
@@ -105,4 +105,4 @@ fun copyK2NativeCompilerArguments(from: K2NativeCompilerArguments, to: K2NativeC
     to.workerExceptionHandling = from.workerExceptionHandling
 
     return to
-}
\ No newline at end of file
+}
diff --git a/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt b/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt
index 22a73fe2407..77723b3a865 100644
--- a/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt
+++ b/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt
@@ -542,6 +542,16 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
             field = value
         }
 
+    @Argument(
+        value = "-Xuse-ir-fake-override-builder",
+        description = "Generate fake overrides via IR. See KT-61514"
+    )
+    var useIrFakeOverrideBuilder = false
+        set(value) {
+            checkFrozen()
+            field = value
+        }
+
     @Argument(
         value = "-Xdisable-ultra-light-classes",
         description = "Do not use the ultra light classes implementation"
diff --git a/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/klib/compilerPipeline.kt b/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/klib/compilerPipeline.kt
index a0ad40dc368..c5d4740e7cf 100644
--- a/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/klib/compilerPipeline.kt
+++ b/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/klib/compilerPipeline.kt
@@ -241,6 +241,8 @@ fun transformFirToIr(
                 .putIfAbsent(CommonConfigurationKeys.EVALUATED_CONST_TRACKER, EvaluatedConstTracker.create()),
             inlineConstTracker = null,
             allowNonCachedDeclarations = false,
+            useIrFakeOverrideBuilder =
+            moduleStructure.compilerConfiguration.getBoolean(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER),
         ),
         IrGenerationExtension.getInstances(moduleStructure.project),
         signatureComposer = DescriptorSignatureComposerStub(JsManglerDesc),
diff --git a/compiler/cli/src/org/jetbrains/kotlin/cli/common/arguments.kt b/compiler/cli/src/org/jetbrains/kotlin/cli/common/arguments.kt
index abbcd3de348..6761142ad92 100644
--- a/compiler/cli/src/org/jetbrains/kotlin/cli/common/arguments.kt
+++ b/compiler/cli/src/org/jetbrains/kotlin/cli/common/arguments.kt
@@ -34,6 +34,7 @@ fun CompilerConfiguration.setupCommonArguments(
     put(CommonConfigurationKeys.INCREMENTAL_COMPILATION, incrementalCompilationIsEnabled(arguments))
     put(CommonConfigurationKeys.ALLOW_ANY_SCRIPTS_IN_SOURCE_ROOTS, arguments.allowAnyScriptsInSourceRoots)
     put(CommonConfigurationKeys.IGNORE_CONST_OPTIMIZATION_ERRORS, arguments.ignoreConstOptimizationErrors)
+    put(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER, arguments.useIrFakeOverrideBuilder)
 
     val metadataVersionString = arguments.metadataVersion
     if (metadataVersionString != null) {
diff --git a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/FirKotlinToJvmBytecodeCompiler.kt b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/FirKotlinToJvmBytecodeCompiler.kt
index 7ad360701a2..08a4495ebe0 100644
--- a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/FirKotlinToJvmBytecodeCompiler.kt
+++ b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/FirKotlinToJvmBytecodeCompiler.kt
@@ -21,20 +21,27 @@ import org.jetbrains.kotlin.cli.jvm.compiler.pipeline.generateCodeFromIr
 import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.compiler.plugin.CompilerPluginRegistrar
 import org.jetbrains.kotlin.compiler.plugin.ComponentRegistrar
-import org.jetbrains.kotlin.config.*
+import org.jetbrains.kotlin.config.CommonConfigurationKeys
+import org.jetbrains.kotlin.config.CompilerConfiguration
+import org.jetbrains.kotlin.config.JVMConfigurationKeys
+import org.jetbrains.kotlin.config.languageVersionSettings
 import org.jetbrains.kotlin.constant.EvaluatedConstTracker
 import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
 import org.jetbrains.kotlin.diagnostics.DiagnosticReporterFactory
 import org.jetbrains.kotlin.diagnostics.impl.BaseDiagnosticsCollector
 import org.jetbrains.kotlin.diagnostics.impl.PendingDiagnosticsCollectorWithSuppress
-import org.jetbrains.kotlin.fir.*
-import org.jetbrains.kotlin.fir.backend.*
-import org.jetbrains.kotlin.fir.backend.jvm.*
+import org.jetbrains.kotlin.fir.FirElement
+import org.jetbrains.kotlin.fir.backend.Fir2IrConfiguration
+import org.jetbrains.kotlin.fir.backend.jvm.JvmFir2IrExtensions
 import org.jetbrains.kotlin.fir.declarations.FirFile
 import org.jetbrains.kotlin.fir.declarations.FirSimpleFunction
 import org.jetbrains.kotlin.fir.extensions.FirAnalysisHandlerExtension
 import org.jetbrains.kotlin.fir.extensions.FirExtensionRegistrar
-import org.jetbrains.kotlin.fir.pipeline.*
+import org.jetbrains.kotlin.fir.packageFqName
+import org.jetbrains.kotlin.fir.pipeline.Fir2IrActualizedResult
+import org.jetbrains.kotlin.fir.pipeline.FirResult
+import org.jetbrains.kotlin.fir.pipeline.buildResolveAndCheckFirFromKtFiles
+import org.jetbrains.kotlin.fir.pipeline.convertToIrAndActualizeForJvm
 import org.jetbrains.kotlin.fir.types.arrayElementType
 import org.jetbrains.kotlin.fir.types.coneType
 import org.jetbrains.kotlin.fir.types.isArrayType
@@ -237,6 +244,7 @@ object FirKotlinToJvmBytecodeCompiler {
                 .putIfAbsent(CommonConfigurationKeys.EVALUATED_CONST_TRACKER, EvaluatedConstTracker.create()),
             inlineConstTracker = configuration[CommonConfigurationKeys.INLINE_CONST_TRACKER],
             allowNonCachedDeclarations = false,
+            useIrFakeOverrideBuilder = configuration.getBoolean(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER),
         )
         return firResult.convertToIrAndActualizeForJvm(
             fir2IrExtensions,
diff --git a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/pipeline/compilerPipeline.kt b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/pipeline/compilerPipeline.kt
index 80d6927dbb3..0e5136c34cb 100644
--- a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/pipeline/compilerPipeline.kt
+++ b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/pipeline/compilerPipeline.kt
@@ -185,6 +185,7 @@ fun convertAnalyzedFirToIr(
             .putIfAbsent(CommonConfigurationKeys.EVALUATED_CONST_TRACKER, EvaluatedConstTracker.create()),
         inlineConstTracker = input.configuration[CommonConfigurationKeys.INLINE_CONST_TRACKER],
         allowNonCachedDeclarations = false,
+        useIrFakeOverrideBuilder = input.configuration.getBoolean(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER),
     )
     val (moduleFragment, components, pluginContext, irActualizedResult) =
         analysisResults.convertToIrAndActualizeForJvm(
diff --git a/compiler/config/src/org/jetbrains/kotlin/config/CommonConfigurationKeys.kt b/compiler/config/src/org/jetbrains/kotlin/config/CommonConfigurationKeys.kt
index f9b4346d3db..1f733996752 100644
--- a/compiler/config/src/org/jetbrains/kotlin/config/CommonConfigurationKeys.kt
+++ b/compiler/config/src/org/jetbrains/kotlin/config/CommonConfigurationKeys.kt
@@ -96,6 +96,10 @@ object CommonConfigurationKeys {
     @JvmField
     val EVALUATED_CONST_TRACKER =
         CompilerConfigurationKey.create<EvaluatedConstTracker>("Keeps track of all evaluated by IrInterpreter constants")
+
+    @JvmField
+    val USE_IR_FAKE_OVERRIDE_BUILDER =
+        CompilerConfigurationKey.create<Boolean>("Generate fake overrides via IR. See KT-61514")
 }
 
 var CompilerConfiguration.languageVersionSettings: LanguageVersionSettings
diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrConfiguration.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrConfiguration.kt
index bd1d405ebd2..5fd65a3eae8 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrConfiguration.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrConfiguration.kt
@@ -37,5 +37,5 @@ data class Fir2IrConfiguration(
     val evaluatedConstTracker: EvaluatedConstTracker,
     val inlineConstTracker: InlineConstTracker?,
     val allowNonCachedDeclarations: Boolean,
-    val useIrFakeOverrideBuilder: Boolean = false
+    val useIrFakeOverrideBuilder: Boolean,
 )
diff --git a/compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalFirJvmCompilerRunner.kt b/compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalFirJvmCompilerRunner.kt
index 4ccd6654d74..b473c8e77a5 100644
--- a/compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalFirJvmCompilerRunner.kt
+++ b/compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalFirJvmCompilerRunner.kt
@@ -279,6 +279,7 @@ open class IncrementalFirJvmCompilerRunner(
                     .putIfAbsent(CommonConfigurationKeys.EVALUATED_CONST_TRACKER, EvaluatedConstTracker.create()),
                 inlineConstTracker = configuration[CommonConfigurationKeys.INLINE_CONST_TRACKER],
                 allowNonCachedDeclarations = false,
+                useIrFakeOverrideBuilder = configuration.getBoolean(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER),
             )
             val irGenerationExtensions =
                 (projectEnvironment as? VfsBasedProjectEnvironment)?.project?.let { IrGenerationExtension.getInstances(it) }.orEmpty()
diff --git a/compiler/testData/cli/js/jsExtraHelp.out b/compiler/testData/cli/js/jsExtraHelp.out
index c54358c7a96..c92cfefef80 100644
--- a/compiler/testData/cli/js/jsExtraHelp.out
+++ b/compiler/testData/cli/js/jsExtraHelp.out
@@ -141,6 +141,7 @@ where advanced options include:
   -Xuse-fir-extended-checkers Use extended analysis mode based on Front-end IR. Warning: this feature is far from being production-ready
   -Xuse-fir-ic               Compile using Front-end IR internal incremental compilation cycle. Warning: this feature is far from being production-ready
   -Xuse-fir-lt               Compile using LightTree parser with Front-end IR
+  -Xuse-ir-fake-override-builder Generate fake overrides via IR. See KT-61514
   -Xuse-k2                   Compile using experimental K2. K2 is a new compiler pipeline, no compatibility guarantees are yet provided
   -Xuse-mixed-named-arguments Enable Support named arguments in their own position even if the result appears as mixed
   -Xverbose-phases           Be verbose while performing these backend phases
diff --git a/compiler/testData/cli/jvm/extraHelp.out b/compiler/testData/cli/jvm/extraHelp.out
index ca958024b61..cc9a9fea9cc 100644
--- a/compiler/testData/cli/jvm/extraHelp.out
+++ b/compiler/testData/cli/jvm/extraHelp.out
@@ -232,6 +232,7 @@ where advanced options include:
   -Xuse-fir-extended-checkers Use extended analysis mode based on Front-end IR. Warning: this feature is far from being production-ready
   -Xuse-fir-ic               Compile using Front-end IR internal incremental compilation cycle. Warning: this feature is far from being production-ready
   -Xuse-fir-lt               Compile using LightTree parser with Front-end IR
+  -Xuse-ir-fake-override-builder Generate fake overrides via IR. See KT-61514
   -Xuse-k2                   Compile using experimental K2. K2 is a new compiler pipeline, no compatibility guarantees are yet provided
   -Xuse-mixed-named-arguments Enable Support named arguments in their own position even if the result appears as mixed
   -Xverbose-phases           Be verbose while performing these backend phases
diff --git a/compiler/tests-compiler-utils/tests/org/jetbrains/kotlin/codegen/GenerationUtils.kt b/compiler/tests-compiler-utils/tests/org/jetbrains/kotlin/codegen/GenerationUtils.kt
index 4d63c65b8a4..fafdd3b66d4 100644
--- a/compiler/tests-compiler-utils/tests/org/jetbrains/kotlin/codegen/GenerationUtils.kt
+++ b/compiler/tests-compiler-utils/tests/org/jetbrains/kotlin/codegen/GenerationUtils.kt
@@ -137,7 +137,8 @@ object GenerationUtils {
             evaluatedConstTracker = configuration
                 .putIfAbsent(CommonConfigurationKeys.EVALUATED_CONST_TRACKER, EvaluatedConstTracker.create()),
             inlineConstTracker = configuration[CommonConfigurationKeys.INLINE_CONST_TRACKER],
-            allowNonCachedDeclarations = false
+            allowNonCachedDeclarations = false,
+            useIrFakeOverrideBuilder = configuration.getBoolean(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER),
         )
 
         val commonMemberStorage = Fir2IrCommonMemberStorage(signatureComposerForJvmFir2Ir(linkViaSignatures), FirJvmKotlinMangler())
diff --git a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Fir2Ir.kt b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Fir2Ir.kt
index 9a91834fe5b..9cd6fac6c02 100644
--- a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Fir2Ir.kt
+++ b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Fir2Ir.kt
@@ -81,6 +81,7 @@ internal fun PhaseContext.fir2Ir(
                     .putIfAbsent(CommonConfigurationKeys.EVALUATED_CONST_TRACKER, EvaluatedConstTracker.create()),
             inlineConstTracker = null,
             allowNonCachedDeclarations = false,
+            useIrFakeOverrideBuilder = configuration.getBoolean(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER),
     )
     val (irModuleFragment, components, pluginContext, irActualizedResult) = input.firResult.convertToIrAndActualize(
             fir2IrExtensions,