diff --git a/platform/bootstrap/src/com/intellij/idea/Main.kt b/platform/bootstrap/src/com/intellij/idea/Main.kt
index 8e1f0c0e5e13..56ddbfba1c07 100644
--- a/platform/bootstrap/src/com/intellij/idea/Main.kt
+++ b/platform/bootstrap/src/com/intellij/idea/Main.kt
@@ -23,7 +23,6 @@ import java.awt.GraphicsEnvironment
 import java.io.IOException
 import java.lang.invoke.MethodHandles
 import java.lang.invoke.MethodType
-import java.nio.file.FileSystems
 import java.nio.file.Files
 import java.nio.file.Path
 import java.util.*
@@ -142,14 +141,7 @@ fun initClassLoader(addCwmLibs: Boolean) {
   val distDir = Path.of(PathManager.getHomePath())
   val classLoader = AppMode::class.java.classLoader as? PathClassLoader
                     ?: throw RuntimeException("You must run JVM with -Djava.system.class.loader=com.intellij.util.lang.PathClassLoader")
-  if (AppMode.isDevServer()) {
-    loadClassPathFromDevBuild(distDir)?.let {
-      classLoader.classPath.addFiles(it)
-    }
-    return
-  }
-
-  val classpath: MutableCollection<Path> = LinkedHashSet()
+  val classpath = LinkedHashSet<Path>()
   val preinstalledPluginDir = distDir.resolve("plugins")
   var pluginDir = preinstalledPluginDir
   var marketPlaceBootDir = BootstrapClassLoaderUtil.findMarketplaceBootDir(pluginDir)
@@ -193,9 +185,11 @@ fun initClassLoader(addCwmLibs: Boolean) {
     // so set the system loader to something that can find projector libs
     updateSystemClassLoader = true
   }
+
   if (!classpath.isEmpty()) {
-    classLoader.classPath.addFiles(java.util.List.copyOf(classpath))
+    classLoader.classPath.addFiles(classpath)
   }
+
   if (installMarketplace) {
     try {
       val spiLoader = PathClassLoader(UrlClassLoader.build().files(listOf(mpBoot)).parent(classLoader))
@@ -218,25 +212,6 @@ fun initClassLoader(addCwmLibs: Boolean) {
   }
 }
 
-private fun loadClassPathFromDevBuild(distDir: Path): List<Path>? {
-  val platformPrefix = System.getProperty("idea.platform.prefix", "idea")
-  val devRunDir = distDir.resolve("out/dev-run")
-  val productDevRunDir = devRunDir.resolve(AppMode.getDevBuildRunDirName(platformPrefix))
-  val coreClassPathFile = productDevRunDir.resolve("core-classpath.txt")
-  if (Files.notExists(coreClassPathFile)) {
-    return null
-  }
-
-  val fs = FileSystems.getDefault()
-  val result = ArrayList<Path>()
-  for (s in Files.readAllLines(coreClassPathFile)) {
-    if (!s.isEmpty()) {
-      result.add(fs.getPath(s))
-    }
-  }
-  return result
-}
-
 private fun addBootstrapTiming(name: String, startupTimings: MutableList<Any>) {
   startupTimings.add(name)
   startupTimings.add(System.nanoTime())
diff --git a/platform/build-scripts/dev-server/src/BuildServer.kt b/platform/build-scripts/dev-server/src/BuildServer.kt
index e798843f2ed6..319737406ad6 100644
--- a/platform/build-scripts/dev-server/src/BuildServer.kt
+++ b/platform/build-scripts/dev-server/src/BuildServer.kt
@@ -10,6 +10,7 @@ import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.Json
 import org.jetbrains.intellij.build.BuildOptions
+import org.jetbrains.intellij.build.JvmArchitecture
 import org.jetbrains.intellij.build.TraceManager
 import org.jetbrains.intellij.build.closeKtorClient
 import java.nio.file.Files
@@ -24,6 +25,19 @@ internal data class ProductConfiguration(@JvmField val modules: List<String>, @J
 
 private const val PRODUCTS_PROPERTIES_PATH = "build/dev-build.json"
 
+@Suppress("SpellCheckingInspection")
+fun getIdeSystemProperties(runDir: Path): Map<String, String> {
+  // see BuildContextImpl.getAdditionalJvmArguments - we should somehow deduplicate code
+  val libDir = runDir.resolve("lib")
+  return mapOf(
+    "jna.boot.library.path" to "$libDir/jna/${JvmArchitecture.currentJvmArch.dirName}",
+    "pty4j.preferred.native.folder" to "$libDir/pty4j",
+    // require bundled JNA dispatcher lib
+    "jna.nosys" to "true",
+    "jna.noclasspath" to "true",
+  )
+}
+
 suspend fun buildProductInProcess(request: BuildRequest) {
   TraceManager.spanBuilder("build ide").setAttribute("request", request.toString()).useWithScope2 {
     val platformPrefix = request.platformPrefix
diff --git a/platform/build-scripts/dev-server/src/DevMainImpl.kt b/platform/build-scripts/dev-server/src/DevMainImpl.kt
index 99205af8ef3a..8c5989b28aa2 100644
--- a/platform/build-scripts/dev-server/src/DevMainImpl.kt
+++ b/platform/build-scripts/dev-server/src/DevMainImpl.kt
@@ -7,7 +7,6 @@ import com.intellij.openapi.application.PathManager
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runBlocking
 import org.jetbrains.intellij.build.ConsoleSpanExporter
-import org.jetbrains.intellij.build.JvmArchitecture
 import org.jetbrains.intellij.build.TracerProviderManager
 import java.nio.file.Path
 import kotlin.io.path.invariantSeparatorsPathString
@@ -31,16 +30,11 @@ private class DevMainImpl {
             keepHttpClient = false,
             platformClassPathConsumer = { classPath, runDir ->
               newClassPath = classPath
-
               homePath = runDir.invariantSeparatorsPathString
 
-              // see BuildContextImpl.getAdditionalJvmArguments - we should somehow deduplicate code
-              val libDir = runDir.resolve("lib")
-              System.setProperty("jna.boot.library.path", "$libDir/jna/${JvmArchitecture.currentJvmArch.dirName}")
-              System.setProperty("pty4j.preferred.native.folder", "$libDir/pty4j")
-              // require bundled JNA dispatcher lib
-              System.setProperty("jna.nosys", "true")
-              System.setProperty("jna.noclasspath", "true")
+              for ((name, value) in getIdeSystemProperties(runDir)) {
+                System.setProperty(name, value)
+              }
             },
           ))
 
diff --git a/platform/core-impl/src/com/intellij/idea/AppMode.java b/platform/core-impl/src/com/intellij/idea/AppMode.java
index 30f0939a7a6c..ab0df053a0c5 100644
--- a/platform/core-impl/src/com/intellij/idea/AppMode.java
+++ b/platform/core-impl/src/com/intellij/idea/AppMode.java
@@ -143,9 +143,4 @@ public final class AppMode {
   public static boolean isDevServer() {
     return Boolean.getBoolean("idea.use.dev.build.server");
   }
-
-  public static String getDevBuildRunDirName(@NotNull String platformPrefix) {
-    String result = System.getProperty("dev.build.dir");
-    return result != null ? result : platformPrefix.equals("Idea") ? "idea-community" : platformPrefix;
-  }
 }