diff --git a/gulpfile.js b/gulpfile.js
index 66d14a086..65a5030b9 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -31,13 +31,17 @@
 
 const gulp = require("gulp");
 const map = require("map-stream");
-const ts = require("gulp-typescript");
 const zip = require("gulp-zip");
+const concat = require("gulp-concat");
+const gspawn = require("gulp-spawn");
+const gexec = require("gulp-exec");
+const ts = require("gulp-typescript");
+const debug = require("gulp-debug");
+const jsonTransform = require('gulp-json-transform');
 const fs = require("fs");
 const del = require("del");
 const through = require('through2');
 const File = require('vinyl');
-const jsonTransform = require('gulp-json-transform');
 
 const paths = {
   ts: {
@@ -68,6 +72,7 @@ const paths = {
       "AUTHORS",
       "README",
       "COPYING",
+      "Makefile",
       "gulpfile.js",
       "tsconfig.json",
       "package.json",
@@ -182,6 +187,14 @@ gulp.task("pogenjs", [], function () {
 });
 
 
+/**
+ * Extract .po files from source code
+ */
+gulp.task("pogen", ["pogenjs"], function () {
+  throw Error("not implemented yet, use 'make pogen'");
+});
+
+
 /**
  * Generate a tsconfig.json with the
  * given compiler options that compiles
diff --git a/package.json b/package.json
index cd458cd09..980375f37 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,11 @@
     "better-assert": "^1.0.2",
     "del": "^2.2.0",
     "gulp": "^3.9.1",
+    "gulp-concat": "^2.6.0",
+    "gulp-debug": "^2.1.2",
     "gulp-json-transform": "^0.3.0",
+    "gulp-spawn": "^0.3.0",
+    "gulp-stream": "0.0.2",
     "gulp-typescript": "^2.10.0",
     "gulp-zip": "^3.1.0",
     "jed": "^1.1.0",