diff --git a/src/main/java/rife/bld/extension/CompileKotlinOperation.java b/src/main/java/rife/bld/extension/CompileKotlinOperation.java
index 0066bc3..1e1725c 100644
--- a/src/main/java/rife/bld/extension/CompileKotlinOperation.java
+++ b/src/main/java/rife/bld/extension/CompileKotlinOperation.java
@@ -83,9 +83,8 @@ public class CompileKotlinOperation extends AbstractOperation<CompileKotlinOpera
             }
             return Collections.emptyList();
         } else {
-            var dir_abs = directory.getAbsoluteFile();
-            return FileUtils.getFileList(dir_abs, KOTLIN_FILE_PATTERN, null).stream().map((file) ->
-                    new File(dir_abs, file)).toList();
+            return FileUtils.getFileList(directory, KOTLIN_FILE_PATTERN, null).stream().map((file) ->
+                    new File(directory, file)).toList();
         }
     }
 
@@ -427,6 +426,20 @@ public class CompileKotlinOperation extends AbstractOperation<CompileKotlinOpera
         return this;
     }
 
+    /**
+     * Provides compiler plugins.
+     *
+     * @param directory the directory containing the plugin JARs
+     * @param plugins   one or more plugins
+     * @return this class instance
+     */
+    public CompileKotlinOperation plugins(File directory, CompileKotlinPlugin... plugins) {
+        for (var plugin : plugins) {
+            plugins_.addAll(CompileKotlinOperation.getJarList(directory, plugin.label));
+        }
+        return this;
+    }
+
     // Combine Kotlin sources
     private Collection<File> sources(Collection<File> files, Collection<File> directories) {
         var sources = new ArrayList<>(files);
diff --git a/src/main/java/rife/bld/extension/CompileKotlinPlugin.java b/src/main/java/rife/bld/extension/CompileKotlinPlugin.java
new file mode 100644
index 0000000..4936655
--- /dev/null
+++ b/src/main/java/rife/bld/extension/CompileKotlinPlugin.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package rife.bld.extension;
+
+public enum CompileKotlinPlugin {
+    ALL_OPEN("^allopen-compiler-plugin-.*$"),
+    ASSIGNMENT("^assignment-compiler-plugin-.*$"),
+    KOTLIN_IMPORTS_DUMPER("^kotlin-imports-dumper-compiler-plugin-.*$"),
+    KOTLIN_SERIALIZATION("^kotlin-serialization-compiler-plugin-.*$"),
+    KOTLINX_SERIALIZATION("^kotlinx-serialization-compiler-plugin-.*$"),
+    LOMBOK("^lombok-compiler-plugin-.*$"),
+    NOARG("^noarg-compiler-plugin-.*$"),
+    SAM_WITH_RECEIVER("^sam-with-receiver-compiler-plugin-.*$");
+
+    public final String label;
+
+    CompileKotlinPlugin(String label) {
+        this.label = label;
+    }
+}
diff --git a/src/test/java/rife/bld/extension/CompileKotlinOperationTest.java b/src/test/java/rife/bld/extension/CompileKotlinOperationTest.java
index ecdd291..77e95e6 100644
--- a/src/test/java/rife/bld/extension/CompileKotlinOperationTest.java
+++ b/src/test/java/rife/bld/extension/CompileKotlinOperationTest.java
@@ -68,6 +68,7 @@ class CompileKotlinOperationTest {
                 testJars.add(f.getAbsolutePath());
             }
 
+
             var op = new CompileKotlinOperation()
                     .fromProject(new BaseProjectBlueprint(new File("examples"), "com.example",
                             "Example"))
@@ -77,9 +78,7 @@ class CompileKotlinOperationTest {
                     .compileMainClasspath(compileJars)
                     .compileTestClasspath(testJars)
                     .compileTestClasspath(compileJars)
-                    .compileTestClasspath(mainDir.getAbsolutePath())
-                    .mainSourceFiles(CompileKotlinOperation.getKotlinFileList(new File("examples/src/main/kotlin")))
-                    .testSourceFiles(CompileKotlinOperation.getKotlinFileList(new File("examples/src/test/kotlin")));
+                    .compileTestClasspath(mainDir.getAbsolutePath());
 
             op.execute();
 
@@ -87,8 +86,12 @@ class CompileKotlinOperationTest {
             assertThat(mainDir).isNotEmptyDirectory();
             assertThat(testDir).isNotEmptyDirectory();
 
-            var exampleClass = Path.of(mainDir.getAbsolutePath(), "com", "example", "Example.class").toFile();
-            assertThat(exampleClass).exists();
+            var mainOut = Path.of(mainDir.getAbsolutePath(), "com", "example").toFile();
+            assertThat(new File(mainOut, "Example.class")).exists();
+            assertThat(new File(mainOut, "Example$Companion.class")).exists();
+
+            var testOut = Path.of(testDir.getAbsolutePath(), "com", "example").toFile();
+            assertThat(new File(testOut, "ExampleTest.class")).exists();
         } finally {
             FileUtils.deleteDirectory(tmpDir);
         }