diff --git a/kotlin-native/backend.native/tests/build.gradle b/kotlin-native/backend.native/tests/build.gradle
index b9d23b48ca7..bcc8b895ffe 100644
--- a/kotlin-native/backend.native/tests/build.gradle
+++ b/kotlin-native/backend.native/tests/build.gradle
@@ -61,7 +61,7 @@ ext.target = platformManager.targetManager(project.testTarget).target
 ext.testLibraryDir = "${ext.testOutputRoot}/klib/platform/${project.target.name}"
 
 // Add executor to run tests depending on a target
-project.convention.plugins.executor = ExecutorServiceKt.create(project)
+project.extensions.executor = ExecutorServiceKt.create(project)
 
 
 compileTestKotlin {
@@ -4710,7 +4710,7 @@ if (PlatformInfo.isAppleTarget(project)) {
         interop = 'objcSmoke'
         doBeforeBuild {
             mkdir(buildDir)
-            execClangForCompilerTests(project.target) {
+            project.extensions.execClang.execClangForCompilerTests(project.target) {
                 args "$projectDir/interop/objc/smoke.m"
                 args "-lobjc", '-fobjc-arc'
                 args '-fPIC', '-shared', '-o', "$buildDir/libobjcsmoke.dylib"
@@ -4735,7 +4735,7 @@ if (PlatformInfo.isAppleTarget(project)) {
         interop = 'objcSmoke'
         doBeforeBuild {
             mkdir(buildDir)
-            execClangForCompilerTests(project.target) {
+            project.extensions.execClang.execClangForCompilerTests(project.target) {
                 args "$projectDir/interop/objc/smoke.m"
                 args "-lobjc", '-fobjc-arc'
                 args '-fPIC', '-shared', '-o', "$buildDir/libobjcsmoke.dylib"
@@ -4773,7 +4773,7 @@ if (PlatformInfo.isAppleTarget(project)) {
 
         doBeforeBuild {
             mkdir(buildDir)
-            execClangForCompilerTests(project.target) {
+            project.extensions.execClang.execClangForCompilerTests(project.target) {
                 args fileTree("$projectDir/interop/objc/tests/") { include '**/*.m' }
                 args "-lobjc", '-fobjc-arc'
                 args '-fPIC', '-shared', '-o', "$buildDir/libobjctests.dylib"
@@ -4793,7 +4793,7 @@ if (PlatformInfo.isAppleTarget(project)) {
 
         doBeforeBuild {
             mkdir(buildDir)
-            execClangForCompilerTests(project.target) {
+            project.extensions.execClang.execClangForCompilerTests(project.target) {
                 args "$projectDir/interop/objc_with_initializer/objc_misc.m"
                 args "-lobjc", '-fobjc-arc'
                 args '-fPIC', '-shared', '-o', "$buildDir/libobjcmisc.dylib"
@@ -4810,7 +4810,7 @@ if (PlatformInfo.isAppleTarget(project)) {
 
         doBeforeBuild {
             mkdir(buildDir)
-            execClangForCompilerTests(project.target) {
+            project.extensions.execClang.execClangForCompilerTests(project.target) {
                 args "$projectDir/interop/objc/msg_send/messaging.m"
                 args "-lobjc", '-fobjc-arc'
                 args '-fPIC', '-shared', '-o', "$buildDir/libobjcmessaging.dylib"
@@ -4828,7 +4828,7 @@ if (PlatformInfo.isAppleTarget(project)) {
 
         doBeforeBuild {
             mkdir(buildDir)
-            execClangForCompilerTests(project.target) {
+            project.extensions.execClang.execClangForCompilerTests(project.target) {
                 args "$projectDir/interop/objc/foreignException/objc_wrap.m"
                 args "-lobjc", '-fobjc-arc'
                 args '-fPIC', '-shared', '-o', "$buildDir/libobjcexception.dylib"
@@ -4847,7 +4847,7 @@ if (PlatformInfo.isAppleTarget(project)) {
 
         doBeforeBuild {
             mkdir(buildDir)
-            execClangForCompilerTests(project.target) {
+            project.extensions.execClang.execClangForCompilerTests(project.target) {
                 args "$projectDir/interop/objc/foreignException/objc_wrap.m"
                 args "-lobjc", '-fobjc-arc'
                 args '-fPIC', '-shared', '-o', "$buildDir/libobjcexception.dylib"
@@ -4866,7 +4866,7 @@ if (PlatformInfo.isAppleTarget(project)) {
 
         doBeforeBuild {
             mkdir(buildDir)
-            execClangForCompilerTests(project.target) {
+            project.extensions.execClang.execClangForCompilerTests(project.target) {
                 args "$projectDir/interop/objc/foreignException/objc_wrap.m"
                 args "-lobjc", '-fobjc-arc'
                 args '-fPIC', '-shared', '-o', "$buildDir/libobjcexception.dylib"
@@ -4909,7 +4909,7 @@ if (PlatformInfo.isAppleTarget(project)) {
 
         doBeforeBuild {
             mkdir(buildDir)
-            execClangForCompilerTests(project.target) {
+            project.extensions.execClang.execClangForCompilerTests(project.target) {
                 args "$projectDir/interop/objc/kt42172/objclib.m"
                 args "-lobjc", '-fobjc-arc'
                 args '-fPIC', '-shared', '-o', "$buildDir/libobjc_kt42172.dylib"
diff --git a/kotlin-native/build-tools/src/main/groovy/org/jetbrains/kotlin/NativeInteropPlugin.groovy b/kotlin-native/build-tools/src/main/groovy/org/jetbrains/kotlin/NativeInteropPlugin.groovy
index 7c3897c4c8b..e12f7d97938 100644
--- a/kotlin-native/build-tools/src/main/groovy/org/jetbrains/kotlin/NativeInteropPlugin.groovy
+++ b/kotlin-native/build-tools/src/main/groovy/org/jetbrains/kotlin/NativeInteropPlugin.groovy
@@ -251,7 +251,7 @@ class NamedNativeInteropConfig implements Named {
                 }
 
                 // TODO: the interop plugin should probably be reworked to execute clang from build scripts directly
-                environment['PATH'] = project.files(project.hostPlatform.clang.clangPaths).asPath +
+                environment['PATH'] = project.files(project.extensions.platformManager.hostPlatform.clang.clangPaths).asPath +
                         File.pathSeparator + environment['PATH']
 
                 args compilerOpts.collectMany { ['-compiler-option', it] }
diff --git a/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/CompilationDatabase.kt b/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/CompilationDatabase.kt
index b4dddca6e9f..e54abc1eebb 100644
--- a/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/CompilationDatabase.kt
+++ b/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/CompilationDatabase.kt
@@ -16,6 +16,7 @@ import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.InputFiles
 import org.gradle.api.tasks.OutputFile
 import org.gradle.api.tasks.TaskAction
+import org.gradle.kotlin.dsl.getByType
 import org.jetbrains.kotlin.bitcode.CompileToBitcode
 import java.io.FileReader
 import java.io.FileWriter
@@ -63,7 +64,7 @@ open class GenerateCompilationDatabase @Inject constructor(@Input val target: St
 
     @TaskAction
     fun run() {
-        val plugin = project.convention.getPlugin(ExecClang::class.java)
+        val plugin = project.extensions.getByType<ExecClang>()
         val executable = plugin.resolveExecutable(executable)
         val args = listOf(executable) + compilerFlags + plugin.clangArgsForCppRuntime(target)
         val entries: List<Entry> = files.map { Entry.create(srcRoot, it, args, outputDir) }
diff --git a/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/KotlinNativeTest.kt b/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/KotlinNativeTest.kt
index 2497bdc6356..4ef4d917344 100644
--- a/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/KotlinNativeTest.kt
+++ b/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/KotlinNativeTest.kt
@@ -11,6 +11,7 @@ import org.gradle.api.Project
 import org.gradle.api.Task
 import org.gradle.api.provider.Provider
 import org.gradle.api.tasks.*
+import org.gradle.kotlin.dsl.getByType
 import org.gradle.language.base.plugins.LifecycleBasePlugin
 import org.gradle.process.ExecSpec
 import org.jetbrains.kotlin.konan.exec.Command
@@ -528,7 +529,7 @@ open class KonanDynamicTest : KonanStandaloneTest() {
 
     private fun clang() {
         val log = ByteArrayOutputStream()
-        val plugin = project.convention.getPlugin(ExecClang::class.java)
+        val plugin = project.extensions.getByType<ExecClang>()
         val artifactsDir = "$outputDirectory/${project.testTarget}"
 
         fun flagsContain(opt: String) = project.globalTestArgs.contains(opt) || flags.contains(opt)
diff --git a/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/bitcode/CompileToBitcode.kt b/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/bitcode/CompileToBitcode.kt
index 0d2efc66a72..84ead77fd5d 100644
--- a/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/bitcode/CompileToBitcode.kt
+++ b/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/bitcode/CompileToBitcode.kt
@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.bitcode
 import org.gradle.api.DefaultTask
 import org.gradle.api.file.FileCollection
 import org.gradle.api.tasks.*
+import org.gradle.kotlin.dsl.getByType
 import org.jetbrains.kotlin.ExecClang
 import org.jetbrains.kotlin.konan.target.Family
 import org.jetbrains.kotlin.konan.target.HostManager
@@ -161,7 +162,7 @@ open class CompileToBitcode @Inject constructor(
     @TaskAction
     fun compile() {
         objDir.mkdirs()
-        val plugin = project.convention.getPlugin(ExecClang::class.java)
+        val plugin = project.extensions.getByType<ExecClang>()
 
         plugin.execKonanClang(target) {
             workingDir = objDir
diff --git a/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/testing/native/NativeTest.kt b/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/testing/native/NativeTest.kt
index 9583f58b7fc..4be97c8a846 100644
--- a/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/testing/native/NativeTest.kt
+++ b/kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/testing/native/NativeTest.kt
@@ -11,6 +11,7 @@ import javax.inject.Inject
 import org.gradle.api.*
 import org.gradle.api.file.ConfigurableFileCollection
 import org.gradle.api.tasks.*
+import org.gradle.kotlin.dsl.getByType
 import org.jetbrains.kotlin.ExecClang
 import org.jetbrains.kotlin.bitcode.CompileToBitcode
 import org.jetbrains.kotlin.bitcode.CompileToBitcodeExtension
@@ -37,7 +38,7 @@ open class CompileNativeTest @Inject constructor(
 
     @TaskAction
     fun compile() {
-        val plugin = project.convention.getPlugin(ExecClang::class.java)
+        val plugin = project.extensions.getByType<ExecClang>()
         val args = clangArgs + sanitizerFlags + listOf(inputFile.absolutePath, "-o", outputFile.absolutePath)
         if (target.family.isAppleFamily) {
             plugin.execToolchainClang(target) {
diff --git a/kotlin-native/build.gradle b/kotlin-native/build.gradle
index 762c4bdf75d..9e209e8cc5d 100644
--- a/kotlin-native/build.gradle
+++ b/kotlin-native/build.gradle
@@ -134,8 +134,8 @@ void setupHostAndTarget() {
 
 void setupClang(Project project) {
 
-    project.convention.plugins.platformManager = project.project(":kotlin-native").ext.platformManager
-    project.convention.plugins.execClang = new org.jetbrains.kotlin.ExecClang(project)
+    project.extensions.platformManager = project.project(":kotlin-native").ext.platformManager
+    project.extensions.execClang = new org.jetbrains.kotlin.ExecClang(project)
 }
 
 void loadLocalProperties() {