diff --git a/tools/idem_apt_install b/tools/idem_apt_install
index de755b3..78c54e3 100755
--- a/tools/idem_apt_install
+++ b/tools/idem_apt_install
@@ -1,7 +1,5 @@
 #!/bin/bash
 
-source "$MIAOU_BASH_DIR"/lib/functions.sh
-
 function usage {
     local BASECMD
     BASECMD=$(basename "$0")
@@ -18,6 +16,8 @@ function usage {
     exit 1
 }
 
+source "$MIAOU_BASH_DIR"/lib/functions.sh
+
 [ "$(id -u)" -ne 0 ] && echo 'root privilege required' && exit 2
 [[ $# -lt 1 ]] && usage
 
@@ -38,8 +38,8 @@ debian)
     ;;
 arch)
     for i in "$@"; do
-        if ! pacman -Ql "$i" 2>/dev/null | grep -q ^ii; then
-            sudo pacman -Sy "$i"
+        if ! pacman -Ql "$i" &>/dev/null; then
+            sudo pacman -S --noconfirm "$i"
         elif [ -n "${VERBOSE+x}" ] && $VERBOSE; then
             echo "pacman package <$i> already installed!"
         fi