diff --git a/metadata/net.sourceforge.andsys.txt b/metadata/net.sourceforge.andsys.txt
index 00198706ea..cbae652723 100644
--- a/metadata/net.sourceforge.andsys.txt
+++ b/metadata/net.sourceforge.andsys.txt
@@ -19,7 +19,7 @@ Repo Type:git
 Repo:git://git.code.sf.net/p/andsys/code
 
 Build Version:0.1.i.8,8,5acdcaf53985812a91ef03ae3d3ee97d1f466168,\
-rm=bin/,target=android-10
+prebuild=rm -rf bin/,target=android-10
 
 Auto Update Mode:None
 Update Check Mode:RepoManifest