diff --git a/trb.sh b/trb.sh
index 924f9bb..37e6b52 100755
--- a/trb.sh
+++ b/trb.sh
@@ -6,15 +6,11 @@ if [ ! -f /usr/bin/zenity ];then
 fi
 
 
-distro=$(lsb_release -a | grep -o "VoidLinux")
-
-auth_prompt_path=$(which pkexec)
-
-if [ -f  ${auth_prompt_path} ];then
-    su_prompt="pkexec"
-else
-    su_prompt="gksudo"
+if ! command -v pkexec >/dev/null 2>&1;then
+    echo "pkexec not installed (install polkit)..."
+    exit 1
 fi
+su_prompt="pkexec"
 
 zenity --question --text "Do you want to trim?"
 if [[ $? == 1 ]];then