diff --git a/conf/app.src b/conf/app.src
index 7244d5a..ae59b8b 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,4 +1,7 @@
 SOURCE_URL=https://icecoder.net/download-zip
+SOURCE_SUM=sha256 checksum
+SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=zip
 SOURCE_IN_SUBDIR=true
+SOURCE_FILENAME=
 SOURCE_EXTRACT=true