diff --git a/build_and_install.sh b/build_and_install.sh
index d769314..9d3efa2 100755
--- a/build_and_install.sh
+++ b/build_and_install.sh
@@ -60,7 +60,13 @@ cssh=ssh
 
 echo
 echo "Install the app"
-$cssh $TARGET "PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/sbin:/usr/local/bin /usr/sbin/upload_apkg -rapp.bin -d -f1 -g1 && echo 'SUCCESS!'"
+ALREADY_INSTALLED=$($cssh $TARGET "del_apkg whatever | grep ${PACKAGE}")
+if [ -n "${ALREADY_INSTALLED}" ]; then
+	$cssh $TARGET "PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/sbin:/usr/local/bin /usr/sbin/upload_apkg -rapp.bin -d -f1 -g1 && echo 'SUCCESS!'"
+else
+	echo "Warning: this usually doesn't work!"
+	$cssh $TARGET "PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/sbin:/usr/local/bin /usr/sbin/upload_apkg -papp.bin -t2 -d -f0 -g1 && echo 'SUCCESS!'"
+fi
 
 
 TEST=tests/$PACKAGE/test.sh