diff --git a/buildiso.sh b/buildiso.sh
index 28b7396..b21d661 100755
--- a/buildiso.sh
+++ b/buildiso.sh
@@ -86,7 +86,7 @@ prepare_iso() {
 
     if [[ ! -f artifacts/${srcliveisofile} ]]; then
         echo -n "Downloading Debian Live ISO... "
-        wget -O artifacts/${srcliveisofile} ${srcliveisourl} &>/dev/null || fail "Error downloading source ISO."
+        wget -O artifacts/${srcliveisofile} ${srcliveisourl} &>/dev/null || { rm -f artifacts/${srcliveisofile}; fail "Error downloading source ISO." }
         echo "done."
     fi