diff --git a/package.json b/package.json
index 83b8785..dbf0297 100644
--- a/package.json
+++ b/package.json
@@ -5,9 +5,9 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "build-ts": "esbuild compilar.ts --target=node18 --outdir=build.js --sourcemap",
-    "build": "pnpm build-ts && node build.js/compilar.js",
-    "check": "tsc --noEmit"
+    "build-ts": "./tool build_ts",
+    "build": "./tool build",
+    "check": "./tool tsc"
   },
   "keywords": [],
   "author": "",
diff --git a/tool b/tool
new file mode 100755
index 0000000..d792489
--- /dev/null
+++ b/tool
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+build_ts() {
+    ./node_modules/.bin/esbuild compilar.ts --target=node18 --outdir=build.js --sourcemap
+}
+build() {
+    build_ts
+    node build.js/compilar.js
+}
+check() {
+    ./node_modules/.bin/tsc --noEmit
+}
+
+fatal() {
+    echo "$1"
+    exit 1
+}
+
+test "$1" = build_ts -o "$1" = build -o "$1" = check || fatal "Comando no válido"
+"$1"