diff --git a/README.md b/README.md
index 9c30869..0ae736e 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Vehicle energy consumption and production simulator. This tool has been created
 
 The easiest way is to use the [online simulator](https://vhelio.org/simulateur-vhelio/).
 
-You can also download the latest pre-built stand-alone version and open `www/vhelio-simulator.html` in your web browser. The program will run in your browser, but won't communicate with any server, this is a purely local application.
+You can also download the latest pre-built stand-alone version and open `vhelio-simulator.html` in your web browser. The program will run in your browser, but won't communicate with any server, this is a purely local application.
 
 ## Building from source
 
@@ -20,6 +20,6 @@ Then go in the `simulator` folder and run this command: `npm install`. This will
 
 ### Build
 
-Execute `build.sh` on Linux, or `build.bat` on Windows.
+Execute `npm run build` from the `simulator` directory.
 
-That's it, you can now open `www/vhelio-simulator.html` in your browser.
+That's it, you can now open `simulator/www/vhelio-simulator.html` in your browser.
diff --git a/simulator/build.bat b/simulator/build.bat
deleted file mode 100644
index c49c59f..0000000
--- a/simulator/build.bat
+++ /dev/null
@@ -1,7 +0,0 @@
-@echo off
-
-pushd src
-node ../tools/embed.js
-node ../node_modules/typescript/lib/tsc.js
-node ../tools/purify.js
-popd
diff --git a/simulator/build.sh b/simulator/build.sh
deleted file mode 100755
index 55c64db..0000000
--- a/simulator/build.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/bash
-
-cd src
-node ../tools/embed.js
-../node_modules/typescript/bin/tsc
-node ../tools/purify.js
diff --git a/simulator/package.json b/simulator/package.json
index d544fae..c1bfc83 100644
--- a/simulator/package.json
+++ b/simulator/package.json
@@ -7,6 +7,9 @@
     "url": "https://gitea.youb.fr/youen/vhelio-simulator.git",
     "directory": "simulator"
   },
+  "scripts": {
+  	"build": "node tools/build.js"
+  },
   "dependencies": {},
   "devDependencies": {
     "purify-css": "^1.2.5",
diff --git a/simulator/tools/build.js b/simulator/tools/build.js
new file mode 100644
index 0000000..3b601d8
--- /dev/null
+++ b/simulator/tools/build.js
@@ -0,0 +1,25 @@
+let child_process = require('child_process');
+
+let toolsDir = __dirname;
+let srcDir = toolsDir + "/../src";
+let nodeModulesDir = toolsDir + "/../node_modules";
+
+let commands = [
+	() => child_process.fork(toolsDir + '/embed.js'),
+	() => child_process.fork(nodeModulesDir + '/typescript/lib/tsc.js', {'cwd': srcDir}),
+	() => child_process.fork(toolsDir + '/purify.js', {'cwd': srcDir})
+];
+
+let commandIdx = 0;
+
+function executeCommand(commandIdx) {
+	let process = commands[commandIdx]();
+	process.on('close', (exitCode) => {
+		if(exitCode != 0) throw "Command " + commands[commandIdx] + " failed with code " + exitCode;
+		commandIdx += 1;
+		if(commandIdx == commands.length) return;
+		executeCommand(commandIdx);
+	});
+}
+
+executeCommand(commandIdx);
diff --git a/simulator/tools/embed.js b/simulator/tools/embed.js
index d84809e..7834235 100644
--- a/simulator/tools/embed.js
+++ b/simulator/tools/embed.js
@@ -47,5 +47,9 @@ function embedCsv(src, dst) {
 	});
 }
 
-embedSvg('../data/climate-zones-map.svg', 'climate-zones-map.svg.ts');
-embedCsv('../data/climate-zones-data.csv', 'climate-zones-data.ts');
+let toolsDir = __dirname;
+let dataDir = toolsDir + "/../data";
+let srcDir = toolsDir + "/../src";
+
+embedSvg(dataDir+'/climate-zones-map.svg', srcDir+'/climate-zones-map.svg.ts');
+embedCsv(dataDir+'/climate-zones-data.csv', srcDir+'/climate-zones-data.ts');