diff --git a/.gitignore b/.gitignore
index 00aab34cd..805970a2a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 t.*
 coverage
 node_modules
+package-lock.json
\ No newline at end of file
diff --git a/README.md b/README.md
index 409e8c48a..e263c936e 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,20 @@ Have Node.js installed. `sudo npm install -g livescript`
 
 After, run `lsc -h` for more information.
 
+### Compilation, Livefile, Live and npm usage
+
+To compile, you can use the `npm run`. The command will look like this:
+
+`npm run [options]`
+
+Here the options:
+
+- `browser`: compile the lib into 2 files, `livescript.js` and `livescript.min.js`. You need to run `lib` before to be sure the lib is correctly build before.
+- `clean`: remove the following directories: browser, lib and coverage.
+- `coverage`: run istanbul to get the package coverage.
+- `lib`: compile the lib itself, creating the lib directory and filling it up with all the js files composing the livescript lib.
+- `package`: (re)generating the `package.json` from the `package.json.ls`.
+- `test`: launch the test script. You need to compile the lib before if you want to test your last modifications.
 
 ### Source
 [git://github.com/gkz/LiveScript.git](git://github.com/gkz/LiveScript.git)
diff --git a/index.ls b/index.ls
new file mode 100644
index 000000000..2795a9cd5
--- /dev/null
+++ b/index.ls
@@ -0,0 +1,160 @@
+# REQUIRES ########################
+
+require! {
+  bach
+  fs
+  optionator
+  'prelude-ls': { each, map }
+}
+
+# VARS ############################
+
+options =
+  * option: \browser
+    alias: \b
+    type: \Boolean
+    description: 'Compile livescript.js and livescript.min.js'
+  * option: \clean
+    alias: \c
+    type: \Boolean
+    description: 'Remove lib, coverage and browser directories'
+  * option: \coverage
+    alias: \i
+    type: \Boolean
+    description: 'Run the coverage (with istanbul)'
+  * option: \lib
+    alias: \l
+    type: \Boolean
+    description: 'Compile the lib'
+  * option: \package
+    alias: \p
+    type: \Boolean
+    description: 'Generate the package.json'
+
+# FUNCTIONS #######################
+
+create-dir = (dir, cb) !-->
+  console.log "creating the directory [ #dir ]"
+  er <-! fs.mkdir dir
+  if er? and er.code isnt \EEXIST then cb e, void
+  else
+    if er? and er.code is \EEXIST
+      console.log "Directory [ #dir ] already exists"
+    else console.log "Directory [ #dir ] CREATED"
+    cb void 2
+
+generic-cb = (err, ok) !-> if err? then console.log err
+
+preroll = ->
+  require! './package': {version}
+  """// Generated by LiveScript #version\n
+     // LiveScript #version
+     // Copyright (c) Jeremy Ashkenas, Satoshi Murakami, George Zahariev
+     // Released under the MIT License
+     // https://raw.githubusercontent.com/gkz/LiveScript/master/LICENSE\n
+  """
+
+# CORE ############################
+
+try
+  op = optionator {options}
+  opts = op.parseArgv process.argv
+  switch
+    # compiling into browser directory #########################################
+    | opts.browser
+      require! {browserify, 'uglify-js':{minify}}
+      # function to compile into livescript.js
+      compile-ls = (cb) !->
+        console.log 'Compiling for livescript.js ...'
+        b = browserify \./lib/browser.js, {require: \./lib/browser.js}
+        (err, buf) <- b.bundle!
+        if err? then cb e, void
+        else
+          try
+            fs.writeFileSync \./browser/livescript.js, (preroll! ++ buf)
+            console.log '==> livescript.js COMPILED'
+            cb void 3
+          catch
+            cb e, void
+      # uglifying livescript.js into livescript.min.js
+      uglifying = (cb) !->
+        console.log 'Uglifying into livescript-min.js...'
+        try
+          code = fs.readFileSync \./browser/livescript.js, \utf-8
+          res = minify code, output: {comments: yes}
+          if res.error? then cb e, void
+          else
+            if res.warnings?
+              console.log '====> UGLIFY WARNINGS <====='
+              JSON.stringify res.warnings |> console.log
+            fs.writeFileSync \./browser/livescript-min.js, res.code
+            console.log '==> livescript-min.js UGLIFIED'
+            cb void 4
+        catch
+          cb e, void
+      # list of all actions done to compile into browser
+      actions =
+        create-dir \browser
+        compile-ls
+        uglifying
+      # compiling and uglifying
+      (bach.series actions) generic-cb
+    # cleaning the repository (removing coverage, lib and browser) #############
+    | opts.clean
+      rmd = (dir) -> (cb) !->
+        console.log "removing `#dir`"
+        fs.rm dir, {force: yes, recursive: yes}, cb
+      args = <[browser lib coverage]> |> map rmd
+      (bach.series args) (err, ok) !->
+        console.log if err? then err else 'dirs removed'
+    # Executing istanbul #######################################################
+    | opts.coverage
+      require! { child_process: {spawn} }
+      istanbul =
+        if process.platform is \win32 then 'node_modules\\.bin\\istanbul.cmd'
+        else 'node_modules/.bin/istanbul'
+      opts = stdio: [process.stdin, process.stdout, process.stderr]
+      spawn istanbul, ['cover', './scripts/test'], opts
+    # compiling the lib ########################################################
+    | opts.lib
+      # generating the parser
+      generate-grammar = (cb) !->
+        console.log 'Generating parser...'
+        require! { path: {resolve, dirname}, '.': {compile}, './lib/grammar' }
+        target = resolve dirname(module.filename), \./lib/parser.js
+        try
+          parser = grammar.generate!
+          fs.writeFileSync target, parser ++ '\n'
+          console.log '==> parser GENERATED'
+          cb void 2
+        catch
+          cb e, void
+      # compiling files from src to lib
+      compile-lib = (cb) !->
+        require! '.': {compile}
+        try
+          mapper = (file) !->
+            console.log "compiling '#file'..."
+            code = fs.readFileSync "./src/#file", \utf-8
+            res = compile code, {bare: yes}
+            fs.writeFileSync "./lib/#{file.split \. .0}.js", res
+          fs.readdirSync \./src |> each mapper
+        catch
+          cb e, void
+      # doing all actions relative to lib
+      actions =
+        create-dir \lib
+        generate-grammar
+        compile-lib
+      (bach.series actions) generic-cb
+    # generating the package.json ##############################################
+    | opts.package
+      require! '.': {compile}
+      pkg = fs.readFileSync \./package.json.ls, \utf-8
+      res = compile pkg, json: yes
+      fs.writeFileSync \./package.json, res
+      console.log 'package.json (re)generated'
+    # Help #####################################################################
+    | otherwise => console.log op.generateHelp!
+catch
+  console.log e
diff --git a/package.json b/package.json
index 0850036cc..45c733faf 100644
--- a/package.json
+++ b/package.json
@@ -33,8 +33,12 @@
     "lsc": "./bin/lsc"
   },
   "scripts": {
-    "pretest": "make force && make force",
-    "test": "make test",
+    "browser": "node bin/lsc index.ls --browser",
+    "clean": "node bin/lsc index.ls --clean",
+    "coverage": "node bin/lsc index.ls --coverage",
+    "lib": "node bin/lsc index.ls --lib",
+    "package": "node bin/lsc index.ls --package",
+    "test": "node script/test",
     "posttest": "git checkout -- lib"
   },
   "preferGlobal": true,
@@ -43,15 +47,16 @@
     "url": "git://github.com/gkz/LiveScript.git"
   },
   "dependencies": {
-    "prelude-ls": "~1.2.1",
     "optionator": "~0.9.1",
+    "prelude-ls": "~1.2.1",
     "source-map": "=0.6.1",
     "source-map-support": "=0.5.6"
   },
   "devDependencies": {
-    "jison": "0.4.18",
-    "uglify-js": "~2.6.4",
+    "bach": "^2.0.1",
+    "browserify": "^13.3.0",
     "istanbul": "~0.4.3",
-    "browserify": "^13.3.0"
+    "jison": "0.4.18",
+    "uglify-js": "~3.17.4"
   }
 }
diff --git a/package.json.ls b/package.json.ls
index ec14e243f..1f6b72b60 100644
--- a/package.json.ls
+++ b/package.json.ls
@@ -33,8 +33,12 @@ bin:
   lsc: './bin/lsc'
 
 scripts:
-  pretest: 'make force && make force'
-  test: 'make test'
+  browser: 'node bin/lsc index.ls --browser'
+  clean: 'node bin/lsc index.ls --clean'
+  coverage: 'node bin/lsc index.ls --coverage'
+  lib: 'node bin/lsc index.ls --lib'
+  'package': 'node bin/lsc index.ls --package'
+  test: 'node script/test'
   posttest: 'git checkout -- lib'
 
 prefer-global: true
@@ -44,13 +48,14 @@ repository:
   url: 'git://github.com/gkz/LiveScript.git'
 
 dependencies:
-  'prelude-ls': '~1.2.1'
   optionator: '~0.9.1'
+  'prelude-ls': '~1.2.1'
   'source-map': '=0.6.1'
   'source-map-support': '=0.5.6'
 
 dev-dependencies:
-  jison: '0.4.18'
-  'uglify-js': '~2.6.4'
-  istanbul: '~0.4.3'
+  bach: '^2.0.1'
   browserify: '^13.3.0'
+  istanbul: '~0.4.3'
+  jison: '0.4.18'
+  'uglify-js': '~3.17.4'
\ No newline at end of file
diff --git a/scripts/preroll b/scripts/preroll
deleted file mode 100755
index 1bf90cc81..000000000
--- a/scripts/preroll
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/usr/bin/env node
-
-var version = require("..").VERSION;
-console.log("// Generated by LiveScript " + version
-          + "\n"
-          + "\n// LiveScript " + version
-          + "\n// Copyright (c) Jeremy Ashkenas, Satoshi Murakami, George Zahariev"
-          + "\n// Released under the MIT License"
-          + "\n// https://raw.githubusercontent.com/gkz/LiveScript/master/LICENSE");