diff --git a/sh/main.sh b/sh/main.sh
index 8339831..470cf72 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -29,13 +29,6 @@ RWX_SELF_NAME="rwx"
 # currently running shell name
 RWX_SHELL="$(cat "/proc/${$}/comm")"
 
-# command name used to run
-# (stripped from hyphen interactive flag)
-RWX_COMMAND_NAME="$(basename "${0}" | sed "s|^-||")"
-case "${RWX_COMMAND_NAME}" in
-"bash" | "dash" | "sh") unset RWX_COMMAND_NAME ;;
-*) ;;
-esac
 # system root directory of the project
 RWX_ROOT_SYSTEM="/usr/local/lib/${RWX_SELF_NAME}"
 # user root directory of the project
@@ -62,9 +55,18 @@ rwx_main() {
 	# load code cache
 	rwx_code_load
 	# context / command
-	if [ -n "${RWX_COMMAND_NAME}" ]; then
+	local command
+	# command name used to run
+	# (stripped from hyphen interactive flag)
+	command="$(basename "${0}" | sed "s|^-||")"
+	case "${command}" in
+	"bash" | "dash" | "sh") unset command ;;
+	*) ;;
+	esac
+	if [ -n "${command}" ]; then
 		local function
-		function="$(rwx_code_alias_function "${RWX_COMMAND_NAME}")"
+		# find the matching function
+		function="$(rwx_code_alias_function "${command}")"
 		if [ -n "${function}" ]; then
 			"${function}" "${@}"
 		fi