diff --git a/metadata/org.atai.TessUI.txt b/metadata/org.atai.TessUI.txt
index 81212f1542..ed1eab84cc 100644
--- a/metadata/org.atai.TessUI.txt
+++ b/metadata/org.atai.TessUI.txt
@@ -16,12 +16,13 @@ Repo Type:git
 Repo:https://git.gitorious.org/character-recognition/character-recognition.git
 
 Build:0.3.6,12
-    disable=missing license, check scanignore
     commit=c8e9ff5790fc4b5f673ccdf761e4b4a1639ce3cb
     subdir=TessUI
     submodules=yes
-    scanignore=ImageViewer/bin/,tesseract-android-tools
-    prebuild=pushd ../tesseract-android-tools && \
+    scanignore=tesseract-android-tools/obj,tesseract-android-tools/libs,tesseract-android-tools-test/obj
+    prebuild=rm -fR ../ImageViewer/bin/* && rm -fR tesseract-android-tools-test/obj/* && \
+        pushd ../tesseract-android-tools && \
+        rm -fR obj/* bin/* libs/* tesseract-android-tools-test && \
         ndk-build -j8 && \
         android update project --path . && \
         ant release && \