diff --git a/metadata/com.commonsware.android.arXiv.txt b/metadata/com.commonsware.android.arXiv.txt
index 48b1dc6fc6..37feb7d91b 100644
--- a/metadata/com.commonsware.android.arXiv.txt
+++ b/metadata/com.commonsware.android.arXiv.txt
@@ -13,7 +13,7 @@ Repo Type:bzr
 Repo:lp:arxivdroid
 
 Build Version:2.0.4,90,!94 but doesn't compile due to apparently missing resource,target=android-11
-Build Version:2.0.6,92,95,target=android-11
+Build Version:2.0.6,92,95,target=android-11,prebuild=sed -i -e "/key\.alias.*/d" -e "/key\.store.*/d" *.properties
 Build Version:2.0.10,96,!No source in repo,target=android-11
 Build Version:2.0.14,100,!No source in repo,target=android-11
 Build Version:2.0.16,102,!No source in repo,target=android-11
diff --git a/metadata/com.ichi2.anki.txt b/metadata/com.ichi2.anki.txt
index 5e688e077b..cea1f952f4 100644
--- a/metadata/com.ichi2.anki.txt
+++ b/metadata/com.ichi2.anki.txt
@@ -19,7 +19,7 @@ Repo:git://github.com/nicolas-raoul/Anki-Android.git
 #Build Version:0.5.1,19,!There is a v0.5.1 tag but the version code is not right
 Build Version:0.6,20,f26b7662ae9db9a92d21
 Build Version:0.7,21,v0.7
-Build Version:1.0,22,v1.0
+Build Version:1.0,22,v1.0,prebuild=sed -i -e "/key\.alias.*/d" -e "/key\.store.*/d" *.properties
 
 Market Version:1.0
 Market Version Code:23