diff --git a/all/modules/lightdm/loginout-install.sh b/all/modules/lightdm/loginout-install.sh
index 94efcce..694c28f 100755
--- a/all/modules/lightdm/loginout-install.sh
+++ b/all/modules/lightdm/loginout-install.sh
@@ -5,7 +5,9 @@ loginout_install() {
 
     [[ ! $(systemctl list-units | grep lightdm) ]] && echo lightdm not running on this machine, aborting && return
 
-     SDIR=$(adirname "$0")
+     SDIR=$(adirname "${BASH_SOURCE[0]}")
+     # echo source directory: $SDIR
+
 
     pushd $SDIR &> /dev/null || exit
     [[ ! -d  /etc/lightdm/lightdm.conf.d ]] && mkdir -p  /etc/lightdm/lightdm.conf.d
@@ -35,8 +37,8 @@ function add_user_session {
 
     module_load confirm
     module_load helpers
-
-    SDIR=$(adirname "$0")
+    
+    SDIR=$(adirname "${BASH_SOURCE[0]}")
     # echo source directory: $SDIR
 
     pushd $SDIR &> /dev/null || exit