diff --git a/usr/local/bin/zio-backup b/usr/local/bin/zio-backup
index 4ddc3e8..a864e43 100755
--- a/usr/local/bin/zio-backup
+++ b/usr/local/bin/zio-backup
@@ -4,7 +4,7 @@ env_dir=$1
 base_dir="$(dirname "$(realpath -s "$0")")"
 root_dir="$base_dir/../../.."
 
-[[ -z $env_dir ]] && env_dir="/etc/zio/backup/"
+[[ -z $env_dir ]] && env_dir="/etc/zio/backup"
 
 function restic_exec() {
     command="$1"
@@ -151,7 +151,7 @@ fi
 if [[ -z $b2_account_id ]]; then
     say_die "B2_ACCOUNT_ID (in $env_dir/config) not set. Aborting..."
 else
-    export B2_ACCOUNT_ID="$b2_account_ID"
+    export B2_ACCOUNT_ID="$b2_account_id"
 fi
 
 if [[ -z $b2_account_key ]]; then
@@ -160,7 +160,7 @@ else
     export B2_ACCOUNT_KEY="$b2_account_key"
 fi
 
-if [[ ! -f $pre_script_file ]]; then
+if [[ -f $pre_script_file ]]; then
     say_do "Executing pre-backup script..."
     . $pre_script_file
 fi
@@ -183,7 +183,7 @@ do
     systemctl start $service
 done
 
-if [[ ! -z $post_script_file ]]; then
+if [[ -f $post_script_file ]]; then
     say_do "Executing post-backup script..."
     . $post_script_file
 fi