diff --git a/.gitignore b/.gitignore
index d40806d5..72bfd4b3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,3 +36,4 @@ configure
 install-sh
 missing
 stamp-h1
+/node_modules
diff --git a/README.md b/README.md
index fd8caf10..1ff92076 100644
--- a/README.md
+++ b/README.md
@@ -79,11 +79,16 @@ The latest version of Spreed WebRTC can be found on GitHub:
   these are only required if you want to make changes.
 
   - [NodeJS](http://nodejs.org/) >= 0.10.0
-  - [JSHint](http://www.jshint.com/) >= 2.0.0
   - [Compass](http://compass-style.org/) >= 1.0.0
   - [Sass](http://sass-lang.com/) >= 3.3.0
-  - [autoprefixer](https://www.npmjs.org/package/autoprefixer) 1.1
   - [Babel](http://babel.pocoo.org/)
+
+  The following Node.js modules are required, these may be installed
+  locally by running `npm install` from the project root. Consult the
+  `package.json` file for more details.
+
+  - [JSHint](http://www.jshint.com/) >= 2.0.0
+  - [autoprefixer](https://www.npmjs.org/package/autoprefixer) >= 1.1
   - [po2json](https://github.com/mikeedwards/po2json)
 
   Styles can be found in src/styles. Translations are found in src/i18n.
diff --git a/configure.ac b/configure.ac
index 4d360e6f..c09093f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -63,13 +63,12 @@ AC_SUBST(AWK)
 AC_PATH_PROGS([FIND],[find])
 AC_SUBST(FIND)
 
-AC_PATH_PROGS([JSHINT],[jshint])
+AC_PATH_PROG([JSHINT],jshint, [], [$PWD/node_modules/.bin$PATH_SEPARATOR$PATH])
 if test x"${JSHINT}" != x"" ; then
     AC_MSG_CHECKING([for version of jshint])
     JSHINT_VERSION=`$JSHINT --version 2>&1 | $SED 's/^jshint v//'`
     AC_MSG_RESULT([$JSHINT_VERSION])
 fi
-AC_SUBST(JSHINT)
 
 AC_PATH_PROGS([PYTHON],[python2 python])
 if test x"${PYTHON}" != x"" ; then
@@ -148,7 +147,7 @@ if test x"${SASS}" != x"" ; then
 fi
 AC_SUBST(SASS_SUPPORT_STYLES)
 
-AC_PATH_PROGS([AUTOPREFIXER],[autoprefixer])
+AC_PATH_PROG([AUTOPREFIXER],autoprefixer, [], [$PWD/node_modules/.bin$PATH_SEPARATOR$PATH])
 if test x"${AUTOPREFIXER}" == x"" ; then
     AC_MSG_WARN([Please install autoprefixer before trying to build styles.])
 else
@@ -156,7 +155,6 @@ else
     AUTOPREFIXER_VERSION=`$AUTOPREFIXER --version | $SED 's/^autoprefixer //'`
     AC_MSG_RESULT([$AUTOPREFIXER_VERSION])
 fi
-AC_SUBST(AUTOPREFIXER)
 
 AC_PATH_PROGS([PYBABEL],[pybabel])
 if test x"${PYBABEL}" == x"" ; then
@@ -175,14 +173,14 @@ if test x"${NPM}" != x"" ; then
     NPM_VERSION=`$NPM --version`
     AC_MSG_RESULT([$NPM_VERSION])
     AC_MSG_CHECKING([for po2json support in node.js])
-    found_po2json=`$NPM list --global 2> /dev/null | $GREP po2json`
+    found_po2json=`{ $NPM list --global & $NPM list; } 2>/dev/null | $GREP -v 'UNMET DEPENDENCY' | $GREP po2json`
     if test x"${found_po2json}" == x"" ; then
         AC_MSG_RESULT([not available])
         AC_MSG_WARN([Please install the node.js module po2json to build i18n.])
     else
         AC_MSG_RESULT([ok])
         AC_MSG_CHECKING([for version of po2json])
-        PO2JSON_VERSION=`$NPM list --global 2>&1 | $GREP po2json | $SED 's/^.*po2json@//'`
+        PO2JSON_VERSION=`{ $NPM list --global & $NPM list; } 2>&1 | $GREP po2json | $SED 's/^.*po2json@//'`
         AC_MSG_RESULT([$PO2JSON_VERSION])
         NODEJS_SUPPORT_PO2JSON=yes
     fi
diff --git a/package.json b/package.json
new file mode 100644
index 00000000..8434df11
--- /dev/null
+++ b/package.json
@@ -0,0 +1,8 @@
+{
+  "private": true,
+  "dependencies": {
+    "jshint": ">= 2.5.5",
+    "autoprefixer": ">= 3.1.0",
+    "po2json": ">= 0.3.0"
+  }
+}
diff --git a/src/i18n/helpers/po2json b/src/i18n/helpers/po2json
old mode 100644
new mode 100755