diff --git a/main/src/main/java/sbt/internal/MetaBuildLoader.java b/main/src/main/java/sbt/internal/MetaBuildLoader.java
index 7bc9beac9..46496ce89 100644
--- a/main/src/main/java/sbt/internal/MetaBuildLoader.java
+++ b/main/src/main/java/sbt/internal/MetaBuildLoader.java
@@ -66,8 +66,11 @@ public final class MetaBuildLoader extends URLClassLoader {
    *     library.
    */
   public static MetaBuildLoader makeLoader(final AppProvider appProvider) throws IOException {
+    // Every org.jline artifact must live in this tier together. The REPL's ScalaInstance
+    // loader is parented to it, so a partial match leaves the REPL running one JLine
+    // version's reader against another's terminal (#9317, #8294).
     final String jlineJars =
-        "jline-?[0-9.]+-sbt-.*|jline-terminal(-(jni))?-[0-9.]+|jline-native-[0-9.]+";
+        "jline-?[0-9.]+-sbt-.*|jline-(terminal(-jni)?|native|reader|builtins|style)-[0-9.]+";
     final String testInterfaceJars = "test-interface(-.*)?";
     final String compilerInterfaceJars = "compiler-interface(-.*)?";
     final String utilInterfaceJars = "util-interface(-.*)?";
diff --git a/sbt-app/src/sbt-test/console/jline-version-conflict/build.sbt b/sbt-app/src/sbt-test/console/jline-version-conflict/build.sbt
new file mode 100644
index 000000000..bc22450cc
--- /dev/null
+++ b/sbt-app/src/sbt-test/console/jline-version-conflict/build.sbt
@@ -0,0 +1,14 @@
+scalaVersion := "3.9.0-RC4"
+
+lazy val markerFile = settingKey[java.io.File]("marker file written by the console REPL once it starts")
+
+markerFile := target.value / "console-jline-ok"
+
+console / initialCommands := {
+  val path = markerFile.value.getAbsolutePath.replace("\\", "\\\\")
+  // Scala 3.9 ships JLine 4 while sbt 1.x ships JLine 3. A partial match in
+  // MetaBuildLoader's JLine tier used to leave the REPL running jline-reader 4.x
+  // against jline-terminal 3.x, which throws NoSuchMethodError before the prompt
+  // (#9317). The marker is only written if the REPL actually starts.
+  s"""java.nio.file.Files.write(java.nio.file.Paths.get("$path"), Array.emptyByteArray)"""
+}
diff --git a/sbt-app/src/sbt-test/console/jline-version-conflict/test b/sbt-app/src/sbt-test/console/jline-version-conflict/test
new file mode 100644
index 000000000..065d0aa92
--- /dev/null
+++ b/sbt-app/src/sbt-test/console/jline-version-conflict/test
@@ -0,0 +1,2 @@
+> console
+$ exists target/console-jline-ok