diff --git a/cmd/enable_nix_login_shells/main.go b/cmd/enable_nix_login_shells/main.go
new file mode 100644
index 00000000..77657cc6
--- /dev/null
+++ b/cmd/enable_nix_login_shells/main.go
@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strings"
+)
+
+// This script requires sudo execution, if it is a reasonable way, including in home.nix may be better
+
+func main() {
+	homePath, ok := os.LookupEnv("HOME")
+	if !ok {
+		log.Fatalf("$HOME is not found")
+	}
+
+	loginAbles := []string{"zsh", "fish"}
+
+	etcShellsBytes, err := os.ReadFile("/etc/shells")
+	if err != nil {
+		log.Fatalf("%v\n", err)
+	}
+
+	etcShells := string(etcShellsBytes)
+	dirty := strings.Clone(etcShells)
+	examplePath := ""
+
+	for _, sh := range loginAbles {
+		shellPath := homePath + "/.nix-profile/bin/" + sh
+		if strings.Contains(etcShells, shellPath) {
+			log.Printf("skip - %s is already registered in /etc/shells\n", shellPath)
+		} else {
+			log.Printf("insert - %s will be registered in /etc/shells\n", shellPath)
+			examplePath = shellPath
+			dirty += fmt.Sprintln(shellPath)
+		}
+	}
+
+	if dirty != etcShells {
+		err = os.WriteFile("/etc/shells", []byte(dirty), os.ModePerm)
+		if err != nil {
+			log.Fatalf("%v\n", err)
+		}
+
+		fmt.Printf(`
+Done! Set one of your favorite shell as follows
+
+chsh -s %s "$(whoami)"
+		`, examplePath)
+	}
+}
diff --git a/scripts/register_login_shells.bash b/scripts/register_login_shells.bash
deleted file mode 100755
index 3304fb01..00000000
--- a/scripts/register_login_shells.bash
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/env bash
-
-# -x shows trace logs
-set -euo pipefail
-
-register_login_shells() {
-	local -r zsh_path="$(which zsh)"
-	local -r fish_path="$(which fish)"
-
-	# https://stackoverflow.com/a/3557165/1212807
-	# https://stackoverflow.com/a/49049781/1212807
-	(
-		grep -qxF "$zsh_path" /etc/shells || echo "$zsh_path"
-		grep -qxF "$fish_path" /etc/shells || echo "$fish_path"
-	) | sudo tee -a /etc/shells
-}
-
-register_login_shells
-
-cat <<'EOF'
-  Done! Set one of your favorite as below
-
-  chsh -s "$(which fish)" "$(whoami)"
-EOF