Look for atomicfu-gradle-plugin version in the buildscript of the current project as well.

atomicfu-gradle-plugin/build.gradle

@@ -36,3 +36,9 @@ dependencies {
 }
 
 evaluationDependsOn(':atomicfu')
+
+processResources {
+    filesMatching("atomicfu.properties") {
+        expand(["atomicfuVersion": project.version])
+    }
+}

atomicfu-gradle-plugin/src/main/kotlin/kotlinx/atomicfu/plugin/gradle/AtomicFUGradlePlugin.kt

@@ -17,12 +17,12 @@ import org.gradle.util.*
 import org.jetbrains.kotlin.gradle.dsl.*
 import org.jetbrains.kotlin.gradle.dsl.KotlinCompile
 import org.jetbrains.kotlin.gradle.plugin.*
-import java.io.*
-import java.util.*
 import org.jetbrains.kotlin.gradle.targets.js.*
 import org.jetbrains.kotlin.gradle.targets.js.ir.KotlinJsIrTarget
 import org.jetbrains.kotlin.gradle.tasks.*
 import org.jetbrains.kotlinx.atomicfu.gradle.*
+import java.io.*
+import java.util.*
 import javax.inject.Inject
 
 private const val EXTENSION_NAME = "atomicfu"
@@ -42,15 +42,27 @@ private const val MIN_SUPPORTED_KGP_VERSION = "1.7.0"
 open class AtomicFUGradlePlugin : Plugin<Project> {
     override fun apply(project: Project) = project.run {
         checkCompatibility()
-        val pluginVersion = rootProject.buildscript.configurations.findByName("classpath")
-            ?.allDependencies?.find { it.name == "atomicfu-gradle-plugin" }?.version
+        // atomicfu version is stored at build time in atomicfu.properties file
+        // located in atomicfu-gradle-plugin resources
+        val pluginVersion = loadPropertyFromResources("atomicfu.properties", "atomicfu.version")
         extensions.add(EXTENSION_NAME, AtomicFUPluginExtension(pluginVersion))
         applyAtomicfuCompilerPlugin()
         configureDependencies()
         configureTasks()
     }
 }
 
+private fun loadPropertyFromResources(propFileName: String, property: String): String {
+    val props = Properties()
+    val inputStream = AtomicFUGradlePlugin::class.java.classLoader!!.getResourceAsStream(propFileName)
+        ?: throw FileNotFoundException("You are applying `kotlinx-atomicfu` plugin of version 0.23.3 or newer, yet we were unable to determine the specific version of the plugin.\". \n" +
+                "Starting from version 0.23.3 of `kotlinx-atomicfu`, the plugin version is extracted from the `atomicfu.properties` file, which resides within the atomicfu-gradle-plugin-{version}.jar. \n" +
+                "However, this file couldn't be found. Please ensure that there are no atomicfu-gradle-plugin-{version}.jar with version older than 0.23.3 present on the classpath.\n" +
+                "If the problem is not resolved, please submit the issue: https://github.com/Kotlin/kotlinx-atomicfu/" )
+    inputStream.use { props.load(it) }
+    return props[property] as String
+}
+
 private fun Project.checkCompatibility() {
     val currentGradleVersion = GradleVersion.current()
     val kotlinVersion = getKotlinVersion()

atomicfu-gradle-plugin/src/main/resources/atomicfu.properties

@@ -0,0 +1 @@
+atomicfu.version=${atomicfuVersion}

integration-testing/examples/multi-module-test/producer/build.gradle.kts

@@ -32,12 +32,5 @@ kotlin {
                 languageVersion = "2.0"
             }
         }
-
-        // This is necessary for now, due to the problem with dependency configuration, see #403
-        val jvmMain by getting {
-            dependencies {
-                api("org.jetbrains.kotlinx:atomicfu:0.23.2")
-            }
-        }
     }
 }