diff --git a/default.nix b/default.nix
index 13cb234..5be2627 100644
--- a/default.nix
+++ b/default.nix
@@ -1,4 +1,4 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {pkgs ? import <nixpkgs> {
     inherit system;
diff --git a/nix/node-env.nix b/nix/node-env.nix
index 389ccae..bd1de3e 100644
--- a/nix/node-env.nix
+++ b/nix/node-env.nix
@@ -1,9 +1,9 @@
 # This file originates from node2nix
 
-{stdenv, nodejs, utillinux, runCommand, writeTextFile}:
+{stdenv, nodejs, python2, utillinux, runCommand, writeTextFile}:
 
 let
-  inherit (nodejs) python;
+  python = if nodejs ? python then nodejs.python else python2;
 
   # Create a tar wrapper that filters all the 'Ignoring unknown extended header keyword' noise
   tarWrapper = runCommand "tarWrapper" {} ''
diff --git a/node-packages.nix b/node-packages.nix
index 6522c09..2cbd174 100644
--- a/node-packages.nix
+++ b/node-packages.nix
@@ -1,4 +1,4 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {nodeEnv, fetchurl, fetchgit, globalBuildInputs ? []}:
 
@@ -103,13 +103,13 @@ let
         sha1 = "e2a75042a9551908bebd25b8523d5f9769d79181";
       };
     };
-    "concat-stream-1.5.2" = {
+    "concat-stream-1.6.0" = {
       name = "concat-stream";
       packageName = "concat-stream";
-      version = "1.5.2";
+      version = "1.6.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/concat-stream/-/concat-stream-1.5.2.tgz";
-        sha1 = "708978624d856af41a5a741defdd261da752c266";
+        url = "https://registry.npmjs.org/concat-stream/-/concat-stream-1.6.0.tgz";
+        sha1 = "0aac662fd52be78964d5532f694784e70110acf7";
       };
     };
     "graceful-fs-4.1.11" = {
@@ -220,13 +220,22 @@ let
         sha1 = "867ac74e3864187b1d3d47d996a78ec5c8830777";
       };
     };
-    "readable-stream-2.0.6" = {
+    "readable-stream-2.2.2" = {
       name = "readable-stream";
       packageName = "readable-stream";
-      version = "2.0.6";
+      version = "2.2.2";
+      src = fetchurl {
+        url = "https://registry.npmjs.org/readable-stream/-/readable-stream-2.2.2.tgz";
+        sha1 = "a9e6fec3c7dda85f8bb1b3ba7028604556fc825e";
+      };
+    };
+    "buffer-shims-1.0.0" = {
+      name = "buffer-shims";
+      packageName = "buffer-shims";
+      version = "1.0.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz";
-        sha1 = "8f90341e68a53ccc928788dacfcd11b36eb9b78e";
+        url = "https://registry.npmjs.org/buffer-shims/-/buffer-shims-1.0.0.tgz";
+        sha1 = "9978ce317388c649ad8793028c3477ef044a8b51";
       };
     };
     "core-util-is-1.0.2" = {
@@ -526,13 +535,13 @@ let
         sha1 = "6373db76909fe570e08d73583365ed828a74eeeb";
       };
     };
-    "uuid-3.0.0" = {
+    "uuid-3.0.1" = {
       name = "uuid";
       packageName = "uuid";
-      version = "3.0.0";
+      version = "3.0.1";
       src = fetchurl {
-        url = "https://registry.npmjs.org/uuid/-/uuid-3.0.0.tgz";
-        sha1 = "6728fc0459c450d796a99c31837569bdf672d728";
+        url = "https://registry.npmjs.org/uuid/-/uuid-3.0.1.tgz";
+        sha1 = "6544bba2dfda8c1cf17e629a3a305e2bb1fee6c1";
       };
     };
     "delayed-stream-1.0.0" = {
@@ -670,13 +679,13 @@ let
         sha1 = "9c0e1c40308ce804f4783618b937fa88f99d50d0";
       };
     };
-    "jsonpointer-4.0.0" = {
+    "jsonpointer-4.0.1" = {
       name = "jsonpointer";
       packageName = "jsonpointer";
-      version = "4.0.0";
+      version = "4.0.1";
       src = fetchurl {
-        url = "https://registry.npmjs.org/jsonpointer/-/jsonpointer-4.0.0.tgz";
-        sha1 = "6661e161d2fc445f19f98430231343722e1fcbd5";
+        url = "https://registry.npmjs.org/jsonpointer/-/jsonpointer-4.0.1.tgz";
+        sha1 = "4fd92cb34e0e9db3c89c8622ecf51f9b978c6cb9";
       };
     };
     "xtend-4.0.1" = {
@@ -841,13 +850,13 @@ let
         sha1 = "650987da0dd74f4ebf5a11377a2aa2d273e97dfd";
       };
     };
-    "tweetnacl-0.14.3" = {
+    "tweetnacl-0.14.5" = {
       name = "tweetnacl";
       packageName = "tweetnacl";
-      version = "0.14.3";
+      version = "0.14.5";
       src = fetchurl {
-        url = "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.3.tgz";
-        sha1 = "3da382f670f25ded78d7b3d1792119bca0b7132d";
+        url = "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz";
+        sha1 = "5ae68177f192d4456269d108afa93ff8743f4f64";
       };
     };
     "jodid25519-1.0.2" = {
@@ -1012,24 +1021,6 @@ let
         sha1 = "84c6e159b81904fdca59a0ef44cd870d31250f9a";
       };
     };
-    "readable-stream-2.2.2" = {
-      name = "readable-stream";
-      packageName = "readable-stream";
-      version = "2.2.2";
-      src = fetchurl {
-        url = "https://registry.npmjs.org/readable-stream/-/readable-stream-2.2.2.tgz";
-        sha1 = "a9e6fec3c7dda85f8bb1b3ba7028604556fc825e";
-      };
-    };
-    "buffer-shims-1.0.0" = {
-      name = "buffer-shims";
-      packageName = "buffer-shims";
-      version = "1.0.0";
-      src = fetchurl {
-        url = "https://registry.npmjs.org/buffer-shims/-/buffer-shims-1.0.0.tgz";
-        sha1 = "9978ce317388c649ad8793028c3477ef044a8b51";
-      };
-    };
     "aproba-1.0.4" = {
       name = "aproba";
       packageName = "aproba";
@@ -1066,13 +1057,13 @@ let
         sha1 = "7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0";
       };
     };
-    "signal-exit-3.0.1" = {
+    "signal-exit-3.0.2" = {
       name = "signal-exit";
       packageName = "signal-exit";
-      version = "3.0.1";
+      version = "3.0.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.1.tgz";
-        sha1 = "5a4c884992b63a7acd9badb7894c3ee9cfccad81";
+        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz";
+        sha1 = "b5fdc08f1287ea1178628e415e25132b73646c6d";
       };
     };
     "string-width-1.0.2" = {
@@ -1156,13 +1147,13 @@ let
         sha1 = "b2e261557ce4c314ec8304f3fa82663e4297ca20";
       };
     };
-    "osenv-0.1.3" = {
+    "osenv-0.1.4" = {
       name = "osenv";
       packageName = "osenv";
-      version = "0.1.3";
+      version = "0.1.4";
       src = fetchurl {
-        url = "https://registry.npmjs.org/osenv/-/osenv-0.1.3.tgz";
-        sha1 = "83cf05c6d6458fc4d5ac6362ea325d92f2754217";
+        url = "https://registry.npmjs.org/osenv/-/osenv-0.1.4.tgz";
+        sha1 = "42fe6d5953df06c8064be6f176c3d05aaaa34644";
       };
     };
     "semver-4.3.6" = {
@@ -1313,7 +1304,7 @@ let
   args = {
     name = "node2nix";
     packageName = "node2nix";
-    version = "1.1.0";
+    version = "1.1.1";
     src = ./.;
     dependencies = [
       sources."optparse-1.0.5"
@@ -1321,12 +1312,13 @@ let
       (sources."npm-registry-client-7.1.2" // {
         dependencies = [
           sources."chownr-1.0.1"
-          (sources."concat-stream-1.5.2" // {
+          (sources."concat-stream-1.6.0" // {
             dependencies = [
               sources."inherits-2.0.3"
               sources."typedarray-0.0.6"
-              (sources."readable-stream-2.0.6" // {
+              (sources."readable-stream-2.2.2" // {
                 dependencies = [
+                  sources."buffer-shims-1.0.0"
                   sources."core-util-is-1.0.2"
                   sources."isarray-1.0.0"
                   sources."process-nextick-args-1.0.7"
@@ -1421,7 +1413,7 @@ let
                           sources."is-property-1.0.2"
                         ];
                       })
-                      sources."jsonpointer-4.0.0"
+                      sources."jsonpointer-4.0.1"
                       sources."xtend-4.0.1"
                     ];
                   })
@@ -1457,7 +1449,7 @@ let
                       sources."dashdash-1.14.1"
                       sources."getpass-0.1.6"
                       sources."jsbn-0.1.0"
-                      sources."tweetnacl-0.14.3"
+                      sources."tweetnacl-0.14.5"
                       sources."jodid25519-1.0.2"
                       sources."ecc-jsbn-0.1.1"
                       sources."bcrypt-pbkdf-1.0.0"
@@ -1482,7 +1474,7 @@ let
                 ];
               })
               sources."tunnel-agent-0.4.3"
-              sources."uuid-3.0.0"
+              sources."uuid-3.0.1"
             ];
           })
           sources."retry-0.8.0"
@@ -1538,7 +1530,7 @@ let
                   sources."has-color-0.1.7"
                   sources."has-unicode-2.0.1"
                   sources."object-assign-4.1.0"
-                  sources."signal-exit-3.0.1"
+                  sources."signal-exit-3.0.2"
                   (sources."string-width-1.0.2" // {
                     dependencies = [
                       sources."code-point-at-1.1.0"
@@ -1586,7 +1578,7 @@ let
               sources."wrappy-1.0.2"
             ];
           })
-          (sources."osenv-0.1.3" // {
+          (sources."osenv-0.1.4" // {
             dependencies = [
               sources."os-homedir-1.0.2"
               sources."os-tmpdir-1.0.2"
diff --git a/tests/default-v4.nix b/tests/default-v4.nix
index 8c69263..9ff4948 100644
--- a/tests/default-v4.nix
+++ b/tests/default-v4.nix
@@ -1,4 +1,4 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {pkgs ? import <nixpkgs> {
     inherit system;
diff --git a/tests/default-v5.nix b/tests/default-v5.nix
index 7b90101..0d2233e 100644
--- a/tests/default-v5.nix
+++ b/tests/default-v5.nix
@@ -1,4 +1,4 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {pkgs ? import <nixpkgs> {
     inherit system;
diff --git a/tests/default-v6.nix b/tests/default-v6.nix
index 7c517e4..9e7c07e 100644
--- a/tests/default-v6.nix
+++ b/tests/default-v6.nix
@@ -1,4 +1,4 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {pkgs ? import <nixpkgs> {
     inherit system;
diff --git a/tests/grunt/default.nix b/tests/grunt/default.nix
index 516d65a..ba3681a 100644
--- a/tests/grunt/default.nix
+++ b/tests/grunt/default.nix
@@ -1,4 +1,4 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {pkgs ? import <nixpkgs> {
     inherit system;
diff --git a/tests/grunt/node-packages.nix b/tests/grunt/node-packages.nix
index c6b4db2..2562cbe 100644
--- a/tests/grunt/node-packages.nix
+++ b/tests/grunt/node-packages.nix
@@ -1,4 +1,4 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {nodeEnv, fetchurl, fetchgit, globalBuildInputs ? []}:
 
@@ -13,13 +13,13 @@ let
         sha1 = "e8778764e944b18f32bb0f10b9078475c9dfb56b";
       };
     };
-    "grunt-contrib-jshint-1.0.0" = {
+    "grunt-contrib-jshint-1.1.0" = {
       name = "grunt-contrib-jshint";
       packageName = "grunt-contrib-jshint";
-      version = "1.0.0";
+      version = "1.1.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/grunt-contrib-jshint/-/grunt-contrib-jshint-1.0.0.tgz";
-        sha1 = "30f405a51de656bfa6eb029b9a464b9fe02a402a";
+        url = "https://registry.npmjs.org/grunt-contrib-jshint/-/grunt-contrib-jshint-1.1.0.tgz";
+        sha1 = "369d909b2593c40e8be79940b21340850c7939ac";
       };
     };
     "grunt-contrib-watch-1.0.0" = {
@@ -301,13 +301,13 @@ let
         sha1 = "988df33feab191ef799a61369dd76c17adf957ea";
       };
     };
-    "signal-exit-3.0.1" = {
+    "signal-exit-3.0.2" = {
       name = "signal-exit";
       packageName = "signal-exit";
-      version = "3.0.1";
+      version = "3.0.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.1.tgz";
-        sha1 = "5a4c884992b63a7acd9badb7894c3ee9cfccad81";
+        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz";
+        sha1 = "b5fdc08f1287ea1178628e415e25132b73646c6d";
       };
     };
     "array-find-index-1.0.2" = {
@@ -1310,7 +1310,7 @@ let
                           sources."array-find-index-1.0.2"
                         ];
                       })
-                      sources."signal-exit-3.0.1"
+                      sources."signal-exit-3.0.2"
                     ];
                   })
                   sources."map-obj-1.0.1"
@@ -1531,7 +1531,7 @@ let
           sources."rimraf-2.2.8"
         ];
       })
-      (sources."grunt-contrib-jshint-1.0.0" // {
+      (sources."grunt-contrib-jshint-1.1.0" // {
         dependencies = [
           (sources."chalk-1.1.3" // {
             dependencies = [
diff --git a/tests/grunt/supplement.nix b/tests/grunt/supplement.nix
index 7bf6b8c..64b767b 100644
--- a/tests/grunt/supplement.nix
+++ b/tests/grunt/supplement.nix
@@ -1,4 +1,4 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {nodeEnv, fetchurl, fetchgit, globalBuildInputs ? []}:
 
@@ -13,13 +13,13 @@ let
         sha1 = "e8778764e944b18f32bb0f10b9078475c9dfb56b";
       };
     };
-    "grunt-contrib-jshint-1.0.0" = {
+    "grunt-contrib-jshint-1.1.0" = {
       name = "grunt-contrib-jshint";
       packageName = "grunt-contrib-jshint";
-      version = "1.0.0";
+      version = "1.1.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/grunt-contrib-jshint/-/grunt-contrib-jshint-1.0.0.tgz";
-        sha1 = "30f405a51de656bfa6eb029b9a464b9fe02a402a";
+        url = "https://registry.npmjs.org/grunt-contrib-jshint/-/grunt-contrib-jshint-1.1.0.tgz";
+        sha1 = "369d909b2593c40e8be79940b21340850c7939ac";
       };
     };
     "grunt-contrib-watch-1.0.0" = {
@@ -301,13 +301,13 @@ let
         sha1 = "988df33feab191ef799a61369dd76c17adf957ea";
       };
     };
-    "signal-exit-3.0.1" = {
+    "signal-exit-3.0.2" = {
       name = "signal-exit";
       packageName = "signal-exit";
-      version = "3.0.1";
+      version = "3.0.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.1.tgz";
-        sha1 = "5a4c884992b63a7acd9badb7894c3ee9cfccad81";
+        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz";
+        sha1 = "b5fdc08f1287ea1178628e415e25132b73646c6d";
       };
     };
     "array-find-index-1.0.2" = {
diff --git a/tests/node-packages-v4.nix b/tests/node-packages-v4.nix
index e88cc8d..9e9a76d 100644
--- a/tests/node-packages-v4.nix
+++ b/tests/node-packages-v4.nix
@@ -1,16 +1,16 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {nodeEnv, fetchurl, fetchgit, globalBuildInputs ? []}:
 
 let
   sources = {
-    "lodash-4.17.2" = {
+    "lodash-4.17.4" = {
       name = "lodash";
       packageName = "lodash";
-      version = "4.17.2";
+      version = "4.17.4";
       src = fetchurl {
-        url = "https://registry.npmjs.org/lodash/-/lodash-4.17.2.tgz";
-        sha1 = "34a3055babe04ce42467b607d700072c7ff6bf42";
+        url = "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz";
+        sha1 = "78203a4d1c328ae1d86dca6460e369b57f4055ae";
       };
     };
     "optparse-1.0.5" = {
@@ -811,13 +811,13 @@ let
         sha1 = "4dfe5bf6be8b8cdc37fcf93e04b65577722710de";
       };
     };
-    "fsevents-1.0.15" = {
+    "fsevents-1.0.17" = {
       name = "fsevents";
       packageName = "fsevents";
-      version = "1.0.15";
+      version = "1.0.17";
       src = fetchurl {
-        url = "https://registry.npmjs.org/fsevents/-/fsevents-1.0.15.tgz";
-        sha1 = "fa63f590f3c2ad91275e4972a6cea545fb0aae44";
+        url = "https://registry.npmjs.org/fsevents/-/fsevents-1.0.17.tgz";
+        sha1 = "8537f3f12272678765b4fd6528c0f1f66f8f4558";
       };
     };
     "native-diff-match-patch-0.3.1" = {
@@ -829,13 +829,13 @@ let
         sha1 = "620304151a78171386ed2e2f3db2e7dfd6436707";
       };
     };
-    "strftime-0.9.2" = {
+    "strftime-0.10.0" = {
       name = "strftime";
       packageName = "strftime";
-      version = "0.9.2";
+      version = "0.10.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/strftime/-/strftime-0.9.2.tgz";
-        sha1 = "bcca2861f29456d372aaf6a17811c8bc6f39f583";
+        url = "https://registry.npmjs.org/strftime/-/strftime-0.10.0.tgz";
+        sha1 = "b3f0fa419295202a5a289f6d6be9f4909a617193";
       };
     };
     "minimist-0.0.8" = {
@@ -1027,13 +1027,13 @@ let
         sha1 = "6373db76909fe570e08d73583365ed828a74eeeb";
       };
     };
-    "uuid-3.0.0" = {
+    "uuid-3.0.1" = {
       name = "uuid";
       packageName = "uuid";
-      version = "3.0.0";
+      version = "3.0.1";
       src = fetchurl {
-        url = "https://registry.npmjs.org/uuid/-/uuid-3.0.0.tgz";
-        sha1 = "6728fc0459c450d796a99c31837569bdf672d728";
+        url = "https://registry.npmjs.org/uuid/-/uuid-3.0.1.tgz";
+        sha1 = "6544bba2dfda8c1cf17e629a3a305e2bb1fee6c1";
       };
     };
     "delayed-stream-1.0.0" = {
@@ -1162,13 +1162,13 @@ let
         sha1 = "9c0e1c40308ce804f4783618b937fa88f99d50d0";
       };
     };
-    "jsonpointer-4.0.0" = {
+    "jsonpointer-4.0.1" = {
       name = "jsonpointer";
       packageName = "jsonpointer";
-      version = "4.0.0";
+      version = "4.0.1";
       src = fetchurl {
-        url = "https://registry.npmjs.org/jsonpointer/-/jsonpointer-4.0.0.tgz";
-        sha1 = "6661e161d2fc445f19f98430231343722e1fcbd5";
+        url = "https://registry.npmjs.org/jsonpointer/-/jsonpointer-4.0.1.tgz";
+        sha1 = "4fd92cb34e0e9db3c89c8622ecf51f9b978c6cb9";
       };
     };
     "xtend-4.0.1" = {
@@ -1333,13 +1333,13 @@ let
         sha1 = "650987da0dd74f4ebf5a11377a2aa2d273e97dfd";
       };
     };
-    "tweetnacl-0.14.3" = {
+    "tweetnacl-0.14.5" = {
       name = "tweetnacl";
       packageName = "tweetnacl";
-      version = "0.14.3";
+      version = "0.14.5";
       src = fetchurl {
-        url = "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.3.tgz";
-        sha1 = "3da382f670f25ded78d7b3d1792119bca0b7132d";
+        url = "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz";
+        sha1 = "5ae68177f192d4456269d108afa93ff8743f4f64";
       };
     };
     "jodid25519-1.0.2" = {
@@ -1378,31 +1378,31 @@ let
         sha1 = "c0d5a63b2718800ad8e1eb0fa5269c84dd41845e";
       };
     };
-    "nan-2.4.0" = {
+    "nan-2.5.0" = {
       name = "nan";
       packageName = "nan";
-      version = "2.4.0";
+      version = "2.5.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/nan/-/nan-2.4.0.tgz";
-        sha1 = "fb3c59d45fe4effe215f0b890f8adf6eb32d2232";
+        url = "https://registry.npmjs.org/nan/-/nan-2.5.0.tgz";
+        sha1 = "aa8f1e34531d807e9e27755b234b4a6ec0c152a8";
       };
     };
-    "node-pre-gyp-0.6.31" = {
+    "node-pre-gyp-0.6.32" = {
       name = "node-pre-gyp";
       packageName = "node-pre-gyp";
-      version = "0.6.31";
+      version = "0.6.32";
       src = fetchurl {
-        url = "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.6.31.tgz";
-        sha1 = "d8a00ddaa301a940615dbcc8caad4024d58f6017";
+        url = "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.6.32.tgz";
+        sha1 = "fc452b376e7319b3d255f5f34853ef6fd8fe1fd5";
       };
     };
-    "npmlog-4.0.1" = {
+    "npmlog-4.0.2" = {
       name = "npmlog";
       packageName = "npmlog";
-      version = "4.0.1";
+      version = "4.0.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/npmlog/-/npmlog-4.0.1.tgz";
-        sha1 = "d14f503b4cd79710375553004ba96e6662fbc0b8";
+        url = "https://registry.npmjs.org/npmlog/-/npmlog-4.0.2.tgz";
+        sha1 = "d03950e0e78ce1527ba26d2a7592e9348ac3e75f";
       };
     };
     "rc-1.1.6" = {
@@ -1468,13 +1468,13 @@ let
         sha1 = "3d7cf4464db6446ea644bf4b39507f9851008e8e";
       };
     };
-    "gauge-2.7.1" = {
+    "gauge-2.7.2" = {
       name = "gauge";
       packageName = "gauge";
-      version = "2.7.1";
+      version = "2.7.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/gauge/-/gauge-2.7.1.tgz";
-        sha1 = "388473894fe8be5e13ffcdb8b93e4ed0616428c7";
+        url = "https://registry.npmjs.org/gauge/-/gauge-2.7.2.tgz";
+        sha1 = "15cecc31b02d05345a5d6b0e171cdb3ad2307774";
       };
     };
     "set-blocking-2.0.0" = {
@@ -1567,13 +1567,13 @@ let
         sha1 = "2713680775e7614c8ba186c065d4e2e52d1072c0";
       };
     };
-    "has-color-0.1.7" = {
-      name = "has-color";
-      packageName = "has-color";
-      version = "0.1.7";
+    "supports-color-0.2.0" = {
+      name = "supports-color";
+      packageName = "supports-color";
+      version = "0.2.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/has-color/-/has-color-0.1.7.tgz";
-        sha1 = "67144a5260c34fc3cca677d041daf52fe7b78b2f";
+        url = "https://registry.npmjs.org/supports-color/-/supports-color-0.2.0.tgz";
+        sha1 = "d92de2694eb3f67323973d7ae3d8b55b4c22190a";
       };
     };
     "has-unicode-2.0.1" = {
@@ -1594,13 +1594,13 @@ let
         sha1 = "7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0";
       };
     };
-    "signal-exit-3.0.1" = {
+    "signal-exit-3.0.2" = {
       name = "signal-exit";
       packageName = "signal-exit";
-      version = "3.0.1";
+      version = "3.0.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.1.tgz";
-        sha1 = "5a4c884992b63a7acd9badb7894c3ee9cfccad81";
+        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz";
+        sha1 = "b5fdc08f1287ea1178628e415e25132b73646c6d";
       };
     };
     "string-width-1.0.2" = {
@@ -1810,13 +1810,13 @@ let
         sha1 = "bb43ff5598a6eb05d89b59fcd129c983313606bf";
       };
     };
-    "lru-cache-4.0.1" = {
+    "lru-cache-4.0.2" = {
       name = "lru-cache";
       packageName = "lru-cache";
-      version = "4.0.1";
+      version = "4.0.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/lru-cache/-/lru-cache-4.0.1.tgz";
-        sha1 = "1343955edaf2e37d9b9e7ee7241e27c4b9fb72be";
+        url = "https://registry.npmjs.org/lru-cache/-/lru-cache-4.0.2.tgz";
+        sha1 = "1d17679c069cda5d040991a09dbc2c0db377e55e";
       };
     };
     "which-1.2.12" = {
@@ -1867,7 +1867,7 @@ in
       sha1 = "2d2160c7788032e4dd6cbe2502f1f9a2c8f6cde4";
     };
     dependencies = [
-      sources."lodash-4.17.2"
+      sources."lodash-4.17.4"
     ];
     buildInputs = globalBuildInputs;
     meta = {
@@ -2268,11 +2268,11 @@ in
   "lodash-github:lodash/lodash" = nodeEnv.buildNodePackage {
     name = "lodash";
     packageName = "lodash";
-    version = "4.17.3-pre";
+    version = "4.17.4";
     src = fetchgit {
       url = "git://github.com/lodash/lodash";
-      rev = "ba69a7a312da8257a9d376d34c18d70aaceb551e";
-      sha256 = "66fa0b2adf30a5d4d89c6b5363f81fb774225a011d61b38cea0fc5de60d1b7b7";
+      rev = "18f5fd9f6a6ab8b28a159e035c796494ca1a09f2";
+      sha256 = "e360372faf7680b81395ff53e35df06116503323b32194d5a35966d771aa782f";
     };
     buildInputs = globalBuildInputs;
     meta = {
@@ -2397,10 +2397,10 @@ in
   coffee-script = nodeEnv.buildNodePackage {
     name = "coffee-script";
     packageName = "coffee-script";
-    version = "1.11.1";
+    version = "1.12.2";
     src = fetchurl {
-      url = "https://registry.npmjs.org/coffee-script/-/coffee-script-1.11.1.tgz";
-      sha1 = "bf1c47ad64443a0d95d12df2b147cc0a4daad6e9";
+      url = "https://registry.npmjs.org/coffee-script/-/coffee-script-1.12.2.tgz";
+      sha1 = "0d4cbdee183f650da95419570c4929d08ef91376";
     };
     buildInputs = globalBuildInputs;
     meta = {
@@ -2423,10 +2423,10 @@ in
       sources."dmp-0.2.0"
       (sources."floorine-0.3.0" // {
         dependencies = [
-          sources."strftime-0.9.2"
+          sources."strftime-0.10.0"
         ];
       })
-      sources."lodash-4.17.2"
+      sources."lodash-4.17.4"
       (sources."minimatch-3.0.3" // {
         dependencies = [
           (sources."brace-expansion-1.1.6" // {
@@ -2498,7 +2498,7 @@ in
                       sources."is-property-1.0.2"
                     ];
                   })
-                  sources."jsonpointer-4.0.0"
+                  sources."jsonpointer-4.0.1"
                   sources."xtend-4.0.1"
                 ];
               })
@@ -2534,7 +2534,7 @@ in
                   sources."dashdash-1.14.1"
                   sources."getpass-0.1.6"
                   sources."jsbn-0.1.0"
-                  sources."tweetnacl-0.14.3"
+                  sources."tweetnacl-0.14.5"
                   sources."jodid25519-1.0.2"
                   sources."ecc-jsbn-0.1.1"
                   sources."bcrypt-pbkdf-1.0.0"
@@ -2559,20 +2559,20 @@ in
             ];
           })
           sources."tunnel-agent-0.4.3"
-          sources."uuid-3.0.0"
+          sources."uuid-3.0.1"
         ];
       })
-      (sources."fsevents-1.0.15" // {
+      (sources."fsevents-1.0.17" // {
         dependencies = [
-          sources."nan-2.4.0"
-          (sources."node-pre-gyp-0.6.31" // {
+          sources."nan-2.5.0"
+          (sources."node-pre-gyp-0.6.32" // {
             dependencies = [
               (sources."nopt-3.0.6" // {
                 dependencies = [
                   sources."abbrev-1.0.9"
                 ];
               })
-              (sources."npmlog-4.0.1" // {
+              (sources."npmlog-4.0.2" // {
                 dependencies = [
                   (sources."are-we-there-yet-1.1.2" // {
                     dependencies = [
@@ -2591,13 +2591,13 @@ in
                     ];
                   })
                   sources."console-control-strings-1.1.0"
-                  (sources."gauge-2.7.1" // {
+                  (sources."gauge-2.7.2" // {
                     dependencies = [
                       sources."aproba-1.0.4"
-                      sources."has-color-0.1.7"
+                      sources."supports-color-0.2.0"
                       sources."has-unicode-2.0.1"
                       sources."object-assign-4.1.0"
-                      sources."signal-exit-3.0.1"
+                      sources."signal-exit-3.0.2"
                       (sources."string-width-1.0.2" // {
                         dependencies = [
                           sources."code-point-at-1.1.0"
@@ -2724,7 +2724,7 @@ in
         dependencies = [
           (sources."cross-spawn-async-2.2.5" // {
             dependencies = [
-              (sources."lru-cache-4.0.1" // {
+              (sources."lru-cache-4.0.2" // {
                 dependencies = [
                   sources."pseudomap-1.0.2"
                   sources."yallist-2.0.0"
diff --git a/tests/node-packages-v5v6.nix b/tests/node-packages-v5v6.nix
index 71d8cb7..1278ec7 100644
--- a/tests/node-packages-v5v6.nix
+++ b/tests/node-packages-v5v6.nix
@@ -1,16 +1,16 @@
-# This file has been generated by node2nix 1.1.0. Do not edit!
+# This file has been generated by node2nix 1.1.1. Do not edit!
 
 {nodeEnv, fetchurl, fetchgit, globalBuildInputs ? []}:
 
 let
   sources = {
-    "lodash-4.17.2" = {
+    "lodash-4.17.4" = {
       name = "lodash";
       packageName = "lodash";
-      version = "4.17.2";
+      version = "4.17.4";
       src = fetchurl {
-        url = "https://registry.npmjs.org/lodash/-/lodash-4.17.2.tgz";
-        sha1 = "34a3055babe04ce42467b607d700072c7ff6bf42";
+        url = "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz";
+        sha1 = "78203a4d1c328ae1d86dca6460e369b57f4055ae";
       };
     };
     "optparse-1.0.5" = {
@@ -811,13 +811,13 @@ let
         sha1 = "4dfe5bf6be8b8cdc37fcf93e04b65577722710de";
       };
     };
-    "fsevents-1.0.15" = {
+    "fsevents-1.0.17" = {
       name = "fsevents";
       packageName = "fsevents";
-      version = "1.0.15";
+      version = "1.0.17";
       src = fetchurl {
-        url = "https://registry.npmjs.org/fsevents/-/fsevents-1.0.15.tgz";
-        sha1 = "fa63f590f3c2ad91275e4972a6cea545fb0aae44";
+        url = "https://registry.npmjs.org/fsevents/-/fsevents-1.0.17.tgz";
+        sha1 = "8537f3f12272678765b4fd6528c0f1f66f8f4558";
       };
     };
     "native-diff-match-patch-0.3.1" = {
@@ -829,13 +829,13 @@ let
         sha1 = "620304151a78171386ed2e2f3db2e7dfd6436707";
       };
     };
-    "strftime-0.9.2" = {
+    "strftime-0.10.0" = {
       name = "strftime";
       packageName = "strftime";
-      version = "0.9.2";
+      version = "0.10.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/strftime/-/strftime-0.9.2.tgz";
-        sha1 = "bcca2861f29456d372aaf6a17811c8bc6f39f583";
+        url = "https://registry.npmjs.org/strftime/-/strftime-0.10.0.tgz";
+        sha1 = "b3f0fa419295202a5a289f6d6be9f4909a617193";
       };
     };
     "minimist-0.0.8" = {
@@ -1018,13 +1018,13 @@ let
         sha1 = "6373db76909fe570e08d73583365ed828a74eeeb";
       };
     };
-    "uuid-3.0.0" = {
+    "uuid-3.0.1" = {
       name = "uuid";
       packageName = "uuid";
-      version = "3.0.0";
+      version = "3.0.1";
       src = fetchurl {
-        url = "https://registry.npmjs.org/uuid/-/uuid-3.0.0.tgz";
-        sha1 = "6728fc0459c450d796a99c31837569bdf672d728";
+        url = "https://registry.npmjs.org/uuid/-/uuid-3.0.1.tgz";
+        sha1 = "6544bba2dfda8c1cf17e629a3a305e2bb1fee6c1";
       };
     };
     "delayed-stream-1.0.0" = {
@@ -1153,13 +1153,13 @@ let
         sha1 = "9c0e1c40308ce804f4783618b937fa88f99d50d0";
       };
     };
-    "jsonpointer-4.0.0" = {
+    "jsonpointer-4.0.1" = {
       name = "jsonpointer";
       packageName = "jsonpointer";
-      version = "4.0.0";
+      version = "4.0.1";
       src = fetchurl {
-        url = "https://registry.npmjs.org/jsonpointer/-/jsonpointer-4.0.0.tgz";
-        sha1 = "6661e161d2fc445f19f98430231343722e1fcbd5";
+        url = "https://registry.npmjs.org/jsonpointer/-/jsonpointer-4.0.1.tgz";
+        sha1 = "4fd92cb34e0e9db3c89c8622ecf51f9b978c6cb9";
       };
     };
     "xtend-4.0.1" = {
@@ -1324,13 +1324,13 @@ let
         sha1 = "650987da0dd74f4ebf5a11377a2aa2d273e97dfd";
       };
     };
-    "tweetnacl-0.14.3" = {
+    "tweetnacl-0.14.5" = {
       name = "tweetnacl";
       packageName = "tweetnacl";
-      version = "0.14.3";
+      version = "0.14.5";
       src = fetchurl {
-        url = "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.3.tgz";
-        sha1 = "3da382f670f25ded78d7b3d1792119bca0b7132d";
+        url = "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz";
+        sha1 = "5ae68177f192d4456269d108afa93ff8743f4f64";
       };
     };
     "jodid25519-1.0.2" = {
@@ -1369,31 +1369,31 @@ let
         sha1 = "c0d5a63b2718800ad8e1eb0fa5269c84dd41845e";
       };
     };
-    "nan-2.4.0" = {
+    "nan-2.5.0" = {
       name = "nan";
       packageName = "nan";
-      version = "2.4.0";
+      version = "2.5.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/nan/-/nan-2.4.0.tgz";
-        sha1 = "fb3c59d45fe4effe215f0b890f8adf6eb32d2232";
+        url = "https://registry.npmjs.org/nan/-/nan-2.5.0.tgz";
+        sha1 = "aa8f1e34531d807e9e27755b234b4a6ec0c152a8";
       };
     };
-    "node-pre-gyp-0.6.31" = {
+    "node-pre-gyp-0.6.32" = {
       name = "node-pre-gyp";
       packageName = "node-pre-gyp";
-      version = "0.6.31";
+      version = "0.6.32";
       src = fetchurl {
-        url = "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.6.31.tgz";
-        sha1 = "d8a00ddaa301a940615dbcc8caad4024d58f6017";
+        url = "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.6.32.tgz";
+        sha1 = "fc452b376e7319b3d255f5f34853ef6fd8fe1fd5";
       };
     };
-    "npmlog-4.0.1" = {
+    "npmlog-4.0.2" = {
       name = "npmlog";
       packageName = "npmlog";
-      version = "4.0.1";
+      version = "4.0.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/npmlog/-/npmlog-4.0.1.tgz";
-        sha1 = "d14f503b4cd79710375553004ba96e6662fbc0b8";
+        url = "https://registry.npmjs.org/npmlog/-/npmlog-4.0.2.tgz";
+        sha1 = "d03950e0e78ce1527ba26d2a7592e9348ac3e75f";
       };
     };
     "rc-1.1.6" = {
@@ -1459,13 +1459,13 @@ let
         sha1 = "3d7cf4464db6446ea644bf4b39507f9851008e8e";
       };
     };
-    "gauge-2.7.1" = {
+    "gauge-2.7.2" = {
       name = "gauge";
       packageName = "gauge";
-      version = "2.7.1";
+      version = "2.7.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/gauge/-/gauge-2.7.1.tgz";
-        sha1 = "388473894fe8be5e13ffcdb8b93e4ed0616428c7";
+        url = "https://registry.npmjs.org/gauge/-/gauge-2.7.2.tgz";
+        sha1 = "15cecc31b02d05345a5d6b0e171cdb3ad2307774";
       };
     };
     "set-blocking-2.0.0" = {
@@ -1558,13 +1558,13 @@ let
         sha1 = "2713680775e7614c8ba186c065d4e2e52d1072c0";
       };
     };
-    "has-color-0.1.7" = {
-      name = "has-color";
-      packageName = "has-color";
-      version = "0.1.7";
+    "supports-color-0.2.0" = {
+      name = "supports-color";
+      packageName = "supports-color";
+      version = "0.2.0";
       src = fetchurl {
-        url = "https://registry.npmjs.org/has-color/-/has-color-0.1.7.tgz";
-        sha1 = "67144a5260c34fc3cca677d041daf52fe7b78b2f";
+        url = "https://registry.npmjs.org/supports-color/-/supports-color-0.2.0.tgz";
+        sha1 = "d92de2694eb3f67323973d7ae3d8b55b4c22190a";
       };
     };
     "has-unicode-2.0.1" = {
@@ -1585,13 +1585,13 @@ let
         sha1 = "7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0";
       };
     };
-    "signal-exit-3.0.1" = {
+    "signal-exit-3.0.2" = {
       name = "signal-exit";
       packageName = "signal-exit";
-      version = "3.0.1";
+      version = "3.0.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.1.tgz";
-        sha1 = "5a4c884992b63a7acd9badb7894c3ee9cfccad81";
+        url = "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz";
+        sha1 = "b5fdc08f1287ea1178628e415e25132b73646c6d";
       };
     };
     "string-width-1.0.2" = {
@@ -1801,13 +1801,13 @@ let
         sha1 = "bb43ff5598a6eb05d89b59fcd129c983313606bf";
       };
     };
-    "lru-cache-4.0.1" = {
+    "lru-cache-4.0.2" = {
       name = "lru-cache";
       packageName = "lru-cache";
-      version = "4.0.1";
+      version = "4.0.2";
       src = fetchurl {
-        url = "https://registry.npmjs.org/lru-cache/-/lru-cache-4.0.1.tgz";
-        sha1 = "1343955edaf2e37d9b9e7ee7241e27c4b9fb72be";
+        url = "https://registry.npmjs.org/lru-cache/-/lru-cache-4.0.2.tgz";
+        sha1 = "1d17679c069cda5d040991a09dbc2c0db377e55e";
       };
     };
     "which-1.2.12" = {
@@ -1858,7 +1858,7 @@ in
       sha1 = "2d2160c7788032e4dd6cbe2502f1f9a2c8f6cde4";
     };
     dependencies = [
-      sources."lodash-4.17.2"
+      sources."lodash-4.17.4"
     ];
     buildInputs = globalBuildInputs;
     meta = {
@@ -2147,11 +2147,11 @@ in
   "lodash-github:lodash/lodash" = nodeEnv.buildNodePackage {
     name = "lodash";
     packageName = "lodash";
-    version = "4.17.3-pre";
+    version = "4.17.4";
     src = fetchgit {
       url = "git://github.com/lodash/lodash";
-      rev = "ba69a7a312da8257a9d376d34c18d70aaceb551e";
-      sha256 = "66fa0b2adf30a5d4d89c6b5363f81fb774225a011d61b38cea0fc5de60d1b7b7";
+      rev = "18f5fd9f6a6ab8b28a159e035c796494ca1a09f2";
+      sha256 = "e360372faf7680b81395ff53e35df06116503323b32194d5a35966d771aa782f";
     };
     buildInputs = globalBuildInputs;
     meta = {
@@ -2246,10 +2246,10 @@ in
   coffee-script = nodeEnv.buildNodePackage {
     name = "coffee-script";
     packageName = "coffee-script";
-    version = "1.11.1";
+    version = "1.12.2";
     src = fetchurl {
-      url = "https://registry.npmjs.org/coffee-script/-/coffee-script-1.11.1.tgz";
-      sha1 = "bf1c47ad64443a0d95d12df2b147cc0a4daad6e9";
+      url = "https://registry.npmjs.org/coffee-script/-/coffee-script-1.12.2.tgz";
+      sha1 = "0d4cbdee183f650da95419570c4929d08ef91376";
     };
     buildInputs = globalBuildInputs;
     meta = {
@@ -2271,15 +2271,15 @@ in
       sources."async-1.5.2"
       sources."dmp-0.2.0"
       sources."floorine-0.3.0"
-      sources."lodash-4.17.2"
+      sources."lodash-4.17.4"
       sources."minimatch-3.0.3"
       sources."mkdirp-0.5.1"
       sources."open-0.0.5"
       sources."optimist-0.6.1"
       sources."request-2.79.0"
-      sources."fsevents-1.0.15"
+      sources."fsevents-1.0.17"
       sources."native-diff-match-patch-0.3.1"
-      sources."strftime-0.9.2"
+      sources."strftime-0.10.0"
       sources."brace-expansion-1.1.6"
       sources."balanced-match-0.4.2"
       sources."concat-map-0.0.1"
@@ -2304,7 +2304,7 @@ in
       sources."stringstream-0.0.5"
       sources."tough-cookie-2.3.2"
       sources."tunnel-agent-0.4.3"
-      sources."uuid-3.0.0"
+      sources."uuid-3.0.1"
       sources."delayed-stream-1.0.0"
       sources."asynckit-0.4.0"
       sources."chalk-1.1.3"
@@ -2320,7 +2320,7 @@ in
       sources."graceful-readlink-1.0.1"
       sources."generate-function-2.0.0"
       sources."generate-object-property-1.2.0"
-      sources."jsonpointer-4.0.0"
+      sources."jsonpointer-4.0.1"
       sources."xtend-4.0.1"
       sources."is-property-1.0.2"
       sources."pinkie-2.0.4"
@@ -2350,16 +2350,16 @@ in
         ];
       })
       sources."jsbn-0.1.0"
-      sources."tweetnacl-0.14.3"
+      sources."tweetnacl-0.14.5"
       sources."jodid25519-1.0.2"
       sources."ecc-jsbn-0.1.1"
       sources."bcrypt-pbkdf-1.0.0"
       sources."mime-db-1.25.0"
       sources."punycode-1.4.1"
-      sources."nan-2.4.0"
-      sources."node-pre-gyp-0.6.31"
+      sources."nan-2.5.0"
+      sources."node-pre-gyp-0.6.32"
       sources."nopt-3.0.6"
-      sources."npmlog-4.0.1"
+      sources."npmlog-4.0.2"
       (sources."rc-1.1.6" // {
         dependencies = [
           sources."minimist-1.2.0"
@@ -2377,7 +2377,11 @@ in
       sources."abbrev-1.0.9"
       sources."are-we-there-yet-1.1.2"
       sources."console-control-strings-1.1.0"
-      sources."gauge-2.7.1"
+      (sources."gauge-2.7.2" // {
+        dependencies = [
+          sources."supports-color-0.2.0"
+        ];
+      })
       sources."set-blocking-2.0.0"
       sources."delegates-1.0.0"
       sources."readable-stream-2.2.2"
@@ -2389,10 +2393,9 @@ in
       sources."string_decoder-0.10.31"
       sources."util-deprecate-1.0.2"
       sources."aproba-1.0.4"
-      sources."has-color-0.1.7"
       sources."has-unicode-2.0.1"
       sources."object-assign-4.1.0"
-      sources."signal-exit-3.0.1"
+      sources."signal-exit-3.0.2"
       sources."string-width-1.0.2"
       sources."wide-align-1.1.0"
       sources."code-point-at-1.1.0"
@@ -2438,7 +2441,7 @@ in
       sources."object-assign-4.1.0"
       sources."path-key-1.0.0"
       sources."strip-eof-1.0.0"
-      sources."lru-cache-4.0.1"
+      sources."lru-cache-4.0.2"
       sources."which-1.2.12"
       sources."pseudomap-1.0.2"
       sources."yallist-2.0.0"