diff --git a/.gitignore b/.gitignore
index fd01f15..640f803 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /node_modules
+/build
 /dist
 /src/test.ts
diff --git a/package.json b/package.json
index 0aeabfc..dcedeaf 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "start": "tsx src/index.ts",
     "test": "tsx src/test.ts",
-    "build": "tsc && esbuild --bundle --minify --sourcemap --platform=node --target=node20 --outdir=build src/index.ts"
+    "build": "tsc && esbuild --bundle --minify --sourcemap --platform=node --target=node20 --outfile=build/sequence.js src/index.ts"
   },
   "author": "Hervé BECHER",
   "license": "ISC",
diff --git a/tsconfig.json b/tsconfig.json
index 4dd3748..53b355a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,7 +5,7 @@
     "moduleResolution": "Node16",
     "rootDir": "src",
     "outDir": "build",
-    "outFile": "build/index.ts",
+    "outFile": "build/sequence.ts",
     "esModuleInterop": true,
     "alwaysStrict": true,
     "strict": true,