diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/CompilationDetails.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/CompilationDetails.kt
index 5b91118c42f..2db9f61c741 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/CompilationDetails.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/CompilationDetails.kt
@@ -11,7 +11,6 @@ import org.gradle.api.UnknownTaskException
 import org.gradle.api.artifacts.Dependency
 import org.gradle.api.file.FileCollection
 import org.gradle.api.file.SourceDirectorySet
-import org.gradle.api.plugins.BasePluginExtension
 import org.gradle.api.tasks.SourceSet
 import org.gradle.api.tasks.TaskProvider
 import org.gradle.api.tasks.bundling.AbstractArchiveTask
@@ -160,7 +159,7 @@ open class DefaultCompilationDetails<T : KotlinCommonOptions>(
 
     override val ownModuleName: String
         get() {
-            val baseName = project.extensions.getByType(BasePluginExtension::class.java)?.archivesName
+            val baseName = project.archivesName
                 ?: project.name
             val suffix = if (isMainCompilationData()) "" else "_$compilationPurpose"
             return filterModuleName("$baseName$suffix")
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinJvmVariant.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinJvmVariant.kt
index e32184010ba..713d7f3353a 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinJvmVariant.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinJvmVariant.kt
@@ -5,12 +5,7 @@
 
 package org.jetbrains.kotlin.gradle.plugin.mpp.pm20
 
-import groovy.lang.Closure
 import org.gradle.api.artifacts.Configuration
-import org.gradle.api.plugins.BasePluginConvention
-import org.gradle.api.Project
-import org.gradle.api.file.FileCollection
-import org.gradle.api.plugins.BasePluginExtension
 import org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions
 import org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptionsImpl
 import org.jetbrains.kotlin.gradle.plugin.*
@@ -50,7 +45,7 @@ class KotlinJvmVariantCompilationData(val variant: KotlinJvmVariant) : KotlinVar
 
 internal fun KotlinGradleVariant.ownModuleName(): String {
     val project = containingModule.project
-    val baseName = project.extensions.getByType(BasePluginExtension::class.java).archivesName.orNull
+    val baseName = project.archivesName
         ?: project.name
     val suffix = if (containingModule.moduleClassifier == null) "" else "_${containingModule.moduleClassifier}"
     return filterModuleName("$baseName$suffix")
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinMetadataCompilationData.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinMetadataCompilationData.kt
index a347bf23176..57b8652b3a6 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinMetadataCompilationData.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinMetadataCompilationData.kt
@@ -9,7 +9,6 @@ import org.gradle.api.DefaultTask
 import org.gradle.api.Project
 import org.gradle.api.file.FileCollection
 import org.gradle.api.file.SourceDirectorySet
-import org.gradle.api.plugins.BasePluginExtension
 import org.gradle.api.tasks.TaskProvider
 import org.jetbrains.kotlin.gradle.dsl.*
 import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformCommonOptionsImpl
@@ -83,7 +82,7 @@ internal abstract class AbstractKotlinFragmentMetadataCompilationData<T : Kotlin
 
     override val moduleName: String
         get() { // FIXME deduplicate with ownModuleName
-            val baseName = project.extensions.getByType(BasePluginExtension::class.java).archivesName.orNull
+            val baseName = project.archivesName
                 ?: project.name
             val suffix = if (module.moduleClassifier == null) "" else "_${module.moduleClassifier}"
             return filterModuleName("$baseName$suffix")
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/Utils.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/Utils.kt
index cf3b17216ea..74bd815aa6e 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/Utils.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/Utils.kt
@@ -8,11 +8,14 @@ package org.jetbrains.kotlin.gradle.plugin.mpp.pm20
 import org.gradle.api.Project
 import org.gradle.api.artifacts.component.BuildIdentifier
 import org.gradle.api.internal.project.ProjectInternal
+import org.gradle.api.plugins.BasePluginConvention
+import org.gradle.api.plugins.BasePluginExtension
 import org.gradle.internal.build.BuildState
 import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
 import org.jetbrains.kotlin.gradle.dsl.KotlinProjectExtension
 import org.jetbrains.kotlin.gradle.dsl.KotlinSingleTargetExtension
 import org.jetbrains.kotlin.gradle.plugin.KotlinTarget
+import org.jetbrains.kotlin.gradle.utils.isGradleVersionAtLeast
 import org.jetbrains.kotlin.project.model.KotlinModule
 import org.jetbrains.kotlin.project.model.LocalModuleIdentifier
 
@@ -28,4 +31,25 @@ fun KotlinModule.representsProject(project: Project): Boolean =
 
 // FIXME internal API?
 fun Project.currentBuildId(): BuildIdentifier =
-    (project as ProjectInternal).services.get(BuildState::class.java).buildIdentifier
\ No newline at end of file
+    (project as ProjectInternal).services.get(BuildState::class.java).buildIdentifier
+
+
+/**
+ * The base name to use for archive files.
+ */
+val Project.archivesName get() = if (isGradleVersionAtLeast(7, 1)) {
+        extensions.getByType(BasePluginExtension::class.java).archivesName.orNull
+    } else {
+        convention.findPlugin(BasePluginConvention::class.java)?.archivesBaseName
+    }
+
+/**
+ * Returns the directory to generate TAR and ZIP archives into.
+ *
+ * @return The directory. Never returns null.
+ */
+val Project.distsDirectory get() = if (isGradleVersionAtLeast(7, 1)) {
+        extensions.getByType(BasePluginExtension::class.java).distsDirectory
+    } else {
+        convention.getPlugin(BasePluginConvention::class.java).distsDirectory
+    }
\ No newline at end of file
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/subtargets/DefaultDistribution.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/subtargets/DefaultDistribution.kt
index a1f6b723331..c8428348a07 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/subtargets/DefaultDistribution.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/subtargets/DefaultDistribution.kt
@@ -6,7 +6,7 @@
 package org.jetbrains.kotlin.gradle.targets.js.subtargets
 
 import org.gradle.api.Project
-import org.gradle.api.plugins.BasePluginExtension
+import org.jetbrains.kotlin.gradle.plugin.mpp.pm20.distsDirectory
 import org.jetbrains.kotlin.gradle.targets.js.dsl.Distribution
 import org.jetbrains.kotlin.gradle.utils.property
 import java.io.File
@@ -20,7 +20,7 @@ class DefaultDistribution(
         project.buildDir
             .let { buildDir ->
                 name?.let { buildDir.resolve(it) }
-                    ?: project.extensions.getByType(BasePluginExtension::class.java).distsDirectory.asFile.get()
+                    ?: project.distsDirectory.asFile.get()
             }
     }
 }
\ No newline at end of file
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpack.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpack.kt
index b8d0d81e338..c393e835bae 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpack.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpack.kt
@@ -11,7 +11,6 @@ import org.gradle.api.file.FileCollection
 import org.gradle.api.file.RegularFileProperty
 import org.gradle.api.internal.file.FileResolver
 import org.gradle.api.model.ObjectFactory
-import org.gradle.api.plugins.BasePluginExtension
 import org.gradle.api.provider.Provider
 import org.gradle.api.tasks.*
 import org.gradle.deployment.internal.Deployment
@@ -21,6 +20,8 @@ import org.gradle.process.internal.ExecHandle
 import org.gradle.process.internal.ExecHandleFactory
 import org.jetbrains.kotlin.gradle.plugin.PropertiesProvider
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinJsCompilation
+import org.jetbrains.kotlin.gradle.plugin.mpp.pm20.archivesName
+import org.jetbrains.kotlin.gradle.plugin.mpp.pm20.distsDirectory
 import org.jetbrains.kotlin.gradle.targets.js.RequiredKotlinJsDependency
 import org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsRootPlugin
 import org.jetbrains.kotlin.gradle.targets.js.npm.RequiresNpmDependencies
@@ -108,7 +109,7 @@ constructor(
 
     @Nested
     val output: KotlinWebpackOutput = KotlinWebpackOutput(
-        library = project.extensions.getByType(BasePluginExtension::class.java).archivesName.orNull,
+        library = project.archivesName,
         libraryTarget = KotlinWebpackOutput.Target.UMD,
         globalObject = "this"
     )
@@ -122,7 +123,7 @@ constructor(
     internal var _destinationDirectory: File? = null
 
     private val defaultDestinationDirectory by lazy {
-        project.extensions.getByType(BasePluginExtension::class.java).distsDirectory.asFile.get()
+        project.distsDirectory.asFile.get()
     }
 
     @get:Internal
@@ -133,7 +134,7 @@ constructor(
         }
 
     private val defaultOutputFileName by lazy {
-        project.extensions.getByType(BasePluginExtension::class.java).archivesName.orNull + ".js"
+        project.archivesName + ".js"
     }
 
     @get:Internal