diff --git a/sh/self.sh b/sh/self.sh
index 1906699..00f15e7 100644
--- a/sh/self.sh
+++ b/sh/self.sh
@@ -63,9 +63,14 @@ rwx_self_init() {
 _rwx_cmd_rwx_install() { rwx_self_install "${@}"; }
 rwx_self_install() {
 	local target="${1}"
-	local command file
+	[ -n "${target}" ] || exit
+	local command file root
+	# code
+	root="${target}${RWX_ROOT_SYSTEM}"
+	rwx_remove "${root}"
+	cp --recursive "${RWX_ROOT_SYSTEM}" "${root}"
 	# commands
-	local root="${target}/usr/local/bin"
+	root="${target}/usr/local/bin"
 	for command in $(rwx_self_commands); do
 		file="${root}/${command}"
 		rwx_remove "${file}"