diff --git a/apt-repo-updater b/apt-repo-updater
index 7f63202..6c7e3d5 100755
--- a/apt-repo-updater
+++ b/apt-repo-updater
@@ -1,13 +1,16 @@
 #!/usr/bin/env bash
 
 WORK_DIR=${WORK_DIR:?"WORK_DIR is not set!!"}
+WORK_DIR="$(realpath "$WORK_DIR")"
 INCOME_DIR=${INCOME_DIR:="${WORK_DIR}/income"}
+FAILED_DIR=${FAILED_DIR:="${INCOME_DIR}/failed"}
 CODENAME=(bookworm)
 
 set -o functrace
 set -o nounset
 set -o errtrace
 set -o errexit
+shopt -s nullglob
 
 function msg {
     local mesg="$1"; shift
@@ -32,14 +35,12 @@ trap 'term_handle' TERM SIGINT INT
 function build_repo {
     trap 'term_delay' TERM SIGINT INT
 
+    local has_deb=0
+
     local return_code=0
-    for deb in "${INCOME_DIR}/"*
+    for deb in "${INCOME_DIR}/"*.deb
     do
-        if [[ "$deb" = *"/*" ]]
-        then
-            msg "no file in $INCOME_DIR, skip this build"
-            break
-        fi
+        has_deb=1
 
         msg "start adding $deb"
         for codename in "${CODENAME[@]}"
@@ -61,6 +62,11 @@ function build_repo {
         rm $deb
     done
 
+    if [[ "$has_deb" == 0 ]]
+    then
+        msg "no .deb file in $INCOME_DIR, skip this build"
+    fi
+
     trap 'term_handle' TERM SIGINT INT
 }