Inject process.env.NODE_ENV into browserify

hack.js

var code = "var process = require.modules.__browserify_process();\n" +
    "process.env.NODE_ENV = '" + process.env.NODE_ENV + "'\n" +
    "require.modules.__browserify_process = function () {\n" +
    "   return process\n" +
    "}"

var target = path.join(__dirname, "dummy.js")
bundle.files[target] = {
    target: path.join(__dirname, "dummy.js")
    , body: code
}

bundle.addEntry(path.join(__dirname, "other.js"), {
    body: "require('" + target+ "')"
})