diff --git a/conf/auto/debian-13.conf.sh b/conf/auto/debian-13.conf.sh
index 6c6861c..11bcbb0 100644
--- a/conf/auto/debian-13.conf.sh
+++ b/conf/auto/debian-13.conf.sh
@@ -1,6 +1,6 @@
 # Check debian.conf file for general declaration
 # This is specific for version 13
 
-export NTP_SERV=ntpsec
-export SOURCE_EXT=source
+export NTP_SERV="ntpsec"
+export SOURCE_EXT="sources"
 export NO_MAIN_SOURCE=true
diff --git a/modules/upgrade_dist.sh b/modules/upgrade_dist.sh
index 2725a6a..0bc7eee 100644
--- a/modules/upgrade_dist.sh
+++ b/modules/upgrade_dist.sh
@@ -69,7 +69,7 @@ upgrade_dist()
     fi
 
     # Remplace source.list from dist with ours (be smarter)
-    if [[ NO_MAIN_SOURCE == true ]]; then
+    if [[ $NO_MAIN_SOURCE == true ]]; then
         install_file "pkgman/${SYS_DIST}_${SYS_VER}.list" "/etc/apt/sources.list.d/debian.${SOURCE_EXT}"
     else
 	# We don't use SOURCE_EXT