diff --git a/sh/main.sh b/sh/main.sh
index 470cf72..16ce907 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -26,9 +26,6 @@ RWX_SELF_NAME="rwx"
 # │ main │ variables │
 # ╰──────┴───────────╯
 
-# currently running shell name
-RWX_SHELL="$(cat "/proc/${$}/comm")"
-
 # system root directory of the project
 RWX_ROOT_SYSTEM="/usr/local/lib/${RWX_SELF_NAME}"
 # user root directory of the project
diff --git a/sh/shell/0.sh b/sh/shell/0.sh
index 6a28c31..c52639b 100644
--- a/sh/shell/0.sh
+++ b/sh/shell/0.sh
@@ -2,6 +2,9 @@
 # │ shell │
 # ╰───────╯
 
+# currently running shell name
+RWX_SHELL="$(cat "/proc/${$}/comm")"
+
 _rwx_shell_color() {
 	local code="${1}"
 	case "${RWX_SHELL}" in