diff --git a/tools/builder/ABuilder.cs b/tools/builder/ABuilder.cs
index 1500d699..ffe46784 100644
--- a/tools/builder/ABuilder.cs
+++ b/tools/builder/ABuilder.cs
@@ -172,6 +172,10 @@ namespace builder
 			Library [] libs = pkg.GetLibraries();
 			for (int i=0; i<libs.Length; i++)
 			{
+				if (libs[i].build_mode == BuildMode.BuildMode_Episode1)
+				{
+					continue;
+				}
 				if (!BuildLibrary(pkg, libs[i]))
 				{
 					throw new System.Exception("Failed to compile library: " + libs[i].binary_name);