diff --git a/build.gradle.kts b/build.gradle.kts
index 93d09a3..084d506 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -65,7 +65,10 @@ fun allSources(): List<SourceDirectorySet> {
 tasks.javadoc {
   dependsOn(embed)
   setSource(allSources())
-  exclude("datadog/instrument/glue", "datadog/instrument/utils/JVM.java")
+  exclude(
+    "datadog/instrument/glue",
+    "datadog/instrument/utils/JVM.java",
+    "**/*.class")
   val javadocOptions = (options as StandardJavadocDocletOptions)
   if (JavaVersion.current().isJava9Compatible) {
     javadocOptions.addBooleanOption("html5", true)
@@ -76,6 +79,7 @@ tasks.javadoc {
 tasks.named<Jar>("sourcesJar") {
   dependsOn(embed)
   from(allSources())
+  exclude("**/*.class")
 }
 
 publishing {
diff --git a/buildSrc/src/main/kotlin/instrument-glue.gradle.kts b/buildSrc/src/main/kotlin/instrument-glue.gradle.kts
index 0a12e92..e68647b 100644
--- a/buildSrc/src/main/kotlin/instrument-glue.gradle.kts
+++ b/buildSrc/src/main/kotlin/instrument-glue.gradle.kts
@@ -20,6 +20,7 @@ sourceSets {
 val glueImplementation = configurations.getByName("glueImplementation")
 dependencies {
   glueImplementation(libs.asm)
+  glueImplementation(libs.asm.commons)
   glueImplementation(libs.spotbugs.annotations)
   glueImplementation(project(":utils"))
 }
@@ -36,9 +37,17 @@ val generateGlue = tasks.register<JavaExec>("generateGlue") {
   mainClass = "datadog.instrument.glue.GlueGenerator"
   classpath = sourceSets["glue"].runtimeClasspath
   args = listOf(resourcePath.toString(), javaPath.toString()) + glue
-  outputs.dirs(resourcePath, javaPath)
+  outputs.dirs(generatedGlueResources, generatedGlueJava)
 }
 
 tasks.processResources { dependsOn(generateGlue) }
 tasks.compileJava { dependsOn(generateGlue) }
 tasks.named("sourcesJar") { dependsOn(generateGlue) }
+
+// exclude generated synthetic class resources from spotbugs
+sourceSets.configureEach {
+  val compiledClasses = output.classesDirs
+  tasks.named<com.github.spotbugs.snom.SpotBugsTask>(getTaskName("spotbugs", null)) {
+    classDirs.setFrom(compiledClasses)
+  }
+}
diff --git a/class-inject/src/glue/java/datadog/instrument/glue/DefineClassGlueGenerator.java b/class-inject/src/glue/java/datadog/instrument/glue/DefineClassGlueGenerator.java
index 224ecac..aa926ce 100644
--- a/class-inject/src/glue/java/datadog/instrument/glue/DefineClassGlueGenerator.java
+++ b/class-inject/src/glue/java/datadog/instrument/glue/DefineClassGlueGenerator.java
@@ -126,7 +126,7 @@ static byte[] generateBytecode(String unsafeNamespace) {
 
     cw.visit(
         V1_8,
-        ACC_PUBLIC | ACC_FINAL,
+        ACC_PUBLIC | ACC_FINAL | ACC_SYNTHETIC,
         DEFINECLASSGLUE_CLASS,
         null,
         OBJECT_CLASS,
diff --git a/utils/build.gradle.kts b/utils/build.gradle.kts
index 5693265..7e79655 100644
--- a/utils/build.gradle.kts
+++ b/utils/build.gradle.kts
@@ -3,7 +3,6 @@ plugins {
 }
 
 dependencies {
-  sampleBytecode("org.springframework:spring-web:7.0.9")
   jmh(project(":testing"))
 }
 
diff --git a/utils/src/main/java/datadog/instrument/glue/GlueGenerator.java b/utils/src/main/java/datadog/instrument/glue/GlueGenerator.java
index d8637a4..b1a9062 100644
--- a/utils/src/main/java/datadog/instrument/glue/GlueGenerator.java
+++ b/utils/src/main/java/datadog/instrument/glue/GlueGenerator.java
@@ -7,6 +7,7 @@
 package datadog.instrument.glue;
 
 import java.lang.reflect.Method;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.List;
@@ -20,14 +21,16 @@ private GlueGenerator() {}
    * Entry-point for generating instrumentation glue into resource files or Java source code.
    *
    * @param args the command-line arguments
-   * @throws ReflectiveOperationException if the glue cannot be generated
+   * @throws Exception if the glue cannot be generated
    */
-  public static void main(String[] args) throws ReflectiveOperationException {
+  public static void main(String[] args) throws Exception {
     if (args.length < 3) {
       throw new IllegalArgumentException("Expected: resource-path java-path glue-name...");
     }
     Path resourcePath = Paths.get(args[0]);
     Path javaPath = Paths.get(args[1]);
+    Files.createDirectories(resourcePath);
+    Files.createDirectories(javaPath);
     for (int i = 2; i < args.length; i++) {
       Class<?> generatorClass = Class.forName("datadog.instrument.glue." + args[i] + "Generator");
       Method generateGlue = generatorClass.getMethod("generateGlue", Path.class, Path.class);