diff --git a/contrib/fedora/rpm/build.sh b/contrib/fedora/rpm/build.sh
index f216d63f24..6da1ade3c1 100755
--- a/contrib/fedora/rpm/build.sh
+++ b/contrib/fedora/rpm/build.sh
@@ -106,20 +106,16 @@ SOURCE="$(abs_path "$SOURCE")" || die "invalid \$SOURCE argument"
 if [ -n "$SOURCE" ]; then
     [[ "$SOURCE_FROM_GIT" == 1 ]] && die "Cannot set both \$SOURCE and \$SOURCE_FROM_GIT=1"
     SOURCE_FROM_GIT=0
-elif [[ "$SOURCE_FROM_GIT" != "0" ]]; then
-    SOURCE="$GITDIR/NetworkManager-${VERSION}.tar."*
-    if [ -f "$SOURCE" ]; then
-        SOURCE_FROM_GIT=0
-    else
+elif [[ "$SOURCE_FROM_GIT" != "1" ]]; then
+    SOURCE="$(ls -1 "$GITDIR/NetworkManager-${VERSION}.tar."* 2>/dev/null | head -n1)"
+    if [[ -z "$SOURCE" ]]; then
+        [[ "$SOURCE_FROM_GIT" == "0" ]] && die "Either set \$SOURCE or set \$SOURCE_FROM_GIT=1"
         SOURCE_FROM_GIT=1
-        SOURCE=
+    else
+        SOURCE_FROM_GIT=0
     fi
 fi
 
-if [[ -z "$SOURCE" && "$SOURCE_FROM_GIT" == "0" ]]; then
-    die "Either set \$SOURCE or set \$SOURCE_FROM_GIT=1"
-fi
-
 SOURCE_NETWORKMANAGER_CONF="$(abs_path "$SOURCE_NETWORKMANAGER_CONF" "$SCRIPTDIR/NetworkManager.conf")" || die "invalid \$SOURCE_NETWORKMANAGER_CONF argument"
 SOURCE_CONFIG_SERVER="$(abs_path "$SOURCE_CONFIG_SERVER" "$SCRIPTDIR/00-server.conf")" || die "invalid \$SOURCE_CONFIG_SERVER argument"
 SOURCE_CONFIG_CONNECTIVITY_FEDORA="$(abs_path "$SOURCE_CONFIG_CONNECTIVITY_FEDORA" "$SCRIPTDIR/20-connectivity-fedora.conf")" || die "invalid \$SOURCE_CONFIG_CONNECTIVITY_FEDORA argument"