diff --git a/install.sh b/install.sh
index adfcb54..1968a66 100755
--- a/install.sh
+++ b/install.sh
@@ -70,16 +70,18 @@ function install_miaou_bash {
   fi
 }
 
-function install_debian_packages {
-  if ! dpkg -l "$DEBIAN_PACKAGES" | tail -n +6 | grep -v ^ii; then
-    sudo apt-get install -y "$DEBIAN_PACKAGES"
+function install_requirements {
+  if [[ -n $(dpkg -l $DEBIAN_PACKAGES 2>&1 | tail -n +6 | grep -v ^ii) ]] ; then
+    sudo apt-get install -y $DEBIAN_PACKAGES
+    else
+    echo requirements already installed!
   fi
 }
 
 # MAIN
 
 set -Eue
-install_debian_packages
+install_requirements
 install_miaou_bash
 install_mise
 install_ruby