Separate plugins for different Gradle APIs

model/build.gradle.kts

@@ -1,16 +1,34 @@
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
 
 plugins {
     id("org.jetbrains.kotlin.jvm")
 }
 
+dependencies {
+    compileOnly(libs.kotlin.stdlib)
+}
+
 java {
     sourceCompatibility = JavaVersion.VERSION_1_8
     targetCompatibility = JavaVersion.VERSION_1_8
 }
 
-kotlin {
-    compilerOptions {
-        jvmTarget.set(JvmTarget.JVM_1_8)
-    }
+kotlin.compilerOptions {
+    @Suppress("DEPRECATION") // we can't use api version greater than 1.4 as minimal supported Gradle version uses kotlin-stdlib 1.4
+    apiVersion.set(KotlinVersion.KOTLIN_1_4)
+    @Suppress("DEPRECATION") // we can't use language version greater than 1.5 as minimal supported Gradle embeds Kotlin 1.4
+    languageVersion.set(KotlinVersion.KOTLIN_1_5)
+    jvmTarget.set(JvmTarget.JVM_1_8)
+    freeCompilerArgs.addAll(
+        listOf(
+            "-Xskip-prerelease-check",
+            "-Xsuppress-version-warnings",
+            // We have to override the default value for `-Xsam-conversions` to `class`
+            // otherwise the compiler would compile lambdas using invokedynamic,
+            // such lambdas are not serializable so are not compatible with Gradle configuration cache.
+            // It doesn't lead to a significant difference in binaries sizes, and previously (before LV 1.5) the `class` value was set by default.
+            "-Xsam-conversions=class",
+        ),
+    )
 }