diff --git a/.zshrc2 b/.zshrc2
index 5de1c14..1102624 100644
--- a/.zshrc2
+++ b/.zshrc2
@@ -61,15 +61,16 @@ antigen apply
 # end of antigen config
 
 # functions
-dotfile_path=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+export DOTFILES=$( cd "$( dirname "${BASH_SOURCE[0]:-${(%):-%x}}" )" && pwd )
 dfs()
 {
-	if [[$1 == 'update']]; then
-		(cd "$dotfile_path" && env git pull)
+	if [[ $1 == update ]]; then
+		(cd "$DOTFILES" && env git pull)
 	else
 		echo "unknown command \"$1\". available: update"
+	fi
 }
 
 # alias
-alias "pls"="sudo $(fc -ln -1)"
-alias "se"="sudo -sE"
\ No newline at end of file
+alias "pls"='sudo $(fc -ln -1)'
+alias "se"='sudo -sE'
\ No newline at end of file
diff --git a/install.sh b/install.sh
index fe94650..0ab7688 100755
--- a/install.sh
+++ b/install.sh
@@ -89,7 +89,7 @@ setup_color() {
 }
 # END of color settings
 
-dotfile_path=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+dotfile_path=$( cd "$( dirname "${BASH_SOURCE[0]:-${(%):-%x}}" )" && pwd )
 home_slashes=${HOME//\//\\\/}
 if [[ ! $dotfile_path == ${home_slashes}* ]]; then 
     fmt_fatal "\"$dotfile_path\" is not under \"$HOME\". aborting ..."