diff --git a/debian/scripts/setup_packages.sh b/debian/scripts/setup_packages.sh
index 8b71305..9769bb0 100644
--- a/debian/scripts/setup_packages.sh
+++ b/debian/scripts/setup_packages.sh
@@ -21,11 +21,11 @@ check_package_preq() {
 }
 check_package_validity() {
   # remove packages when "influxdb" AND "influxdb2-cli"
-  if [[ echo "$packages" | grep -qw "influxdb" && echo "$packages" | grep -qw "influxdb2-cli" ]]; then
-    echo "PACKAGES includes \"influxdb\" AND \"influxdb2-cli\"."
+  if echo "$packages" | grep -qw "influxdb" && echo "$packages" | grep -qw "influxdb2-cli"; then
+    echo "PACKAGES includes influxdb AND influxdb2-cli."
     echo "As installing both packages together is not possible, they will be skipped."
     packages=$(echo "$packages" | sed 's/influxdb//g;s/influxdb2-cli//g')
-    if [[ "$debug" == "true" ]]; then echo "[DEBUG] New list of packages: = ""$packages"; fi
+    if [[ $debug == "true" ]]; then echo "[DEBUG] New list of packages: = ""$packages"; fi
     echo ' '
   fi
   # check string for double spaces