diff --git a/build.gradle.kts b/build.gradle.kts
index d71a0b9..51d2127 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -103,12 +103,18 @@ val prepareServiceFiles = tasks.register("prepareServiceFiles") {
     doLast {
         val registrars = mutableSetOf<String>()
         inputFiles.forEach { file ->
-            registrars.addAll(file.readLines().filter { it.isNotBlank() })
+            println("Checking file: ${file.absolutePath}, exists: ${file.exists()}")
+            if (file.exists()) {
+                val lines = file.readLines().filter { it.isNotBlank() }
+                println("Found lines: $lines")
+                registrars.addAll(lines)
+            }
         }
         
         val mergedFile = outputDir.get().file(serviceFile).asFile
         mergedFile.parentFile.mkdirs()
         mergedFile.writeText(registrars.joinToString("\n"))
+        println("Merged service file content: \n${registrars.joinToString("\n")}")
     }
 }
 
@@ -122,9 +128,10 @@ tasks.register<Jar>("bundleAll") {
     from(prepareServiceFiles) {
         into("META-INF/services")
         include("org.adrianvictor.lib.versioning.VersionedServiceRegistrar")
+        duplicatesStrategy = DuplicatesStrategy.INCLUDE
     }
 
-    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    duplicatesStrategy = DuplicatesStrategy.INCLUDE
 
     archiveClassifier.set("all-implementations")
     archiveVersion.set(project.version.toString())
@@ -162,5 +169,6 @@ tasks.withType<JavaCompile> {
 
 tasks.runServer {
     minecraftVersion("1.21.1")
-    pluginJars.from(tasks.named("jarR1_21"))
+    // Include ONLY the all-implementations jar as the plugin
+    pluginJars.setFrom(tasks.named("bundleAll"))
 }
\ No newline at end of file
diff --git a/src/main/java/org/adrianvictor/lib/Main.java b/src/main/java/org/adrianvictor/lib/Main.java
index 6190da1..d10d7fd 100644
--- a/src/main/java/org/adrianvictor/lib/Main.java
+++ b/src/main/java/org/adrianvictor/lib/Main.java
@@ -10,19 +10,29 @@ import java.util.ServiceLoader;
 
 public class Main extends JavaPlugin {
 
+    static {
+        System.out.println("Main class loaded!");
+    }
+
     private static VersionedServiceFactory versionedServiceFactory;
     private static VersionMatcher versionMatcher;
 
     @Override
     public void onEnable() {
         versionMatcher = new VersionMatcher();
-
         versionedServiceFactory = new DefaultVersionedServiceFactory(versionMatcher);
 
-        ServiceLoader<VersionedServiceRegistrar> registrars = ServiceLoader.load(VersionedServiceRegistrar.class, getClassLoader());
+        ClassLoader cl = getClassLoader();
+        getLogger().info("Plugin ClassLoader: " + cl.getClass().getName());
+        String serviceFile = "META-INF/services/org.adrianvictor.lib.versioning.VersionedServiceRegistrar";
+        java.net.URL res = cl.getResource(serviceFile);
+        getLogger().info("Service file resource: " + res);
+
+        ServiceLoader<VersionedServiceRegistrar> registrars = ServiceLoader.load(VersionedServiceRegistrar.class, cl);
         int count = 0;
         for (VersionedServiceRegistrar registrar : registrars) {
             registrar.register(versionedServiceFactory);
+            getLogger().info("Registered registrar: " + registrar.getClass().getName());
             count++;
         }
         getLogger().info("Registered " + count + " version-specific registrars.");