diff --git a/vtm-web/build.gradle b/vtm-web/build.gradle
index e0bef236..55dfb510 100644
--- a/vtm-web/build.gradle
+++ b/vtm-web/build.gradle
@@ -12,7 +12,9 @@ apply plugin: 'maven'
 apply plugin: 'gwt-base'
 
 sourceSets {
+    // Exclude nested folder 'emu' from 'src' and add it manually
     main.java.srcDirs = ['src', 'src/org/oscim/gdx/emu']
+    main.java.exclude '**/emu/**'
 }
 
 dependencies {