diff --git a/bsp/src/mill/bsp/MillBuildServer.scala b/bsp/src/mill/bsp/MillBuildServer.scala
index d077e92b0bc..c900022347e 100644
--- a/bsp/src/mill/bsp/MillBuildServer.scala
+++ b/bsp/src/mill/bsp/MillBuildServer.scala
@@ -133,12 +133,9 @@ class MillBuildServer(evaluator: Evaluator, bspVersion: String, serverVersion: S
 
       val items = dependencySourcesParams.getTargets.asScala
         .foldLeft(Seq.empty[DependencySourcesItem]) { (items, targetId) =>
-          val all = if (targetId == millBuildTargetId) {
-            Try(getClass.getClassLoader.asInstanceOf[SpecialClassLoader]).fold(
-              _ => Seq.empty,
-              _.allJars.filter(url => isSourceJar(url) && exists(Path(url.getFile))).map(_.toURI.toString)
-            )
-          } else {
+          val all = if (targetId == millBuildTargetId)
+            getMillBuildClasspath(evaluator, source = true)
+          else {
             val module = getModule(targetId, modules)
             val sources = evaluateInformativeTask(
               evaluator,
@@ -375,10 +372,7 @@ class MillBuildServer(evaluator: Evaluator, bspVersion: String, serverVersion: S
         .foldLeft(Seq.empty[ScalacOptionsItem]) { (items, targetId) =>
           val newItem =
             if (targetId == millBuildTargetId) {
-              val classpath = Try(getClass.getClassLoader.asInstanceOf[SpecialClassLoader]).fold(
-                _ => Seq.empty,
-                _.allJars.filter(url => !isSourceJar(url) && exists(Path(url.getFile))).map(_.toURI.toString)
-              )
+              val classpath = getMillBuildClasspath(evaluator, source = false)
               Some(new ScalacOptionsItem(
                 targetId,
                 Seq.empty.asJava,
diff --git a/bsp/src/mill/bsp/ModuleUtils.scala b/bsp/src/mill/bsp/ModuleUtils.scala
index bb9162b6cf2..b846e83dc66 100644
--- a/bsp/src/mill/bsp/ModuleUtils.scala
+++ b/bsp/src/mill/bsp/ModuleUtils.scala
@@ -1,7 +1,9 @@
 package mill.bsp
 
+import ammonite.runtime.SpecialClassLoader
 import ch.epfl.scala.bsp4j._
 import java.net.URL
+import java.net.URLClassLoader
 import mill._
 import mill.api.Result.Success
 import mill.api.{PathRef, Strict}
@@ -13,7 +15,9 @@ import mill.scalalib.api.Util
 import mill.scalalib.{JavaModule, ScalaModule, TestModule}
 import mill.scalanativelib._
 import mill.util.Ctx
+import os.{Path, exists}
 import scala.collection.JavaConverters._
+import scala.util.Try
 
 /**
  * Utilities for translating the mill build into
@@ -101,6 +105,17 @@ object ModuleUtils {
     target
   }
 
+  def getMillBuildClasspath(evaluator: Evaluator, source: Boolean): Seq[String] = {
+    val all = Try(evaluator.rootModule.getClass.getClassLoader.asInstanceOf[SpecialClassLoader]).fold(
+      _ => Seq.empty,
+      _.allJars
+    )
+    val filtered =
+      if (source) all.filter(url => isSourceJar(url))
+      else all.filter(url => !isSourceJar(url))
+    filtered.filter(url => exists(Path(url.getFile))).map(_.toURI.toString)
+  }
+
   /**
    * Compute the BuildTarget associated with the given mill
    * JavaModule, which is any module present in the working