node-packages: add packages for v6

pkgs/development/node-packages/composition-v6.nix

@@ -0,0 +1,16 @@
+# This file has been generated by node2nix 1.1.0. Do not edit!
+
+{pkgs ? import <nixpkgs> {
+    inherit system;
+  }, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-5_x"}:
+
+let
+  nodeEnv = import ./node-env.nix {
+    inherit (pkgs) stdenv python utillinux runCommand writeTextFile;
+    inherit nodejs;
+  };
+in
+import ./node-packages-v6.nix {
+  inherit (pkgs) fetchurl fetchgit;
+  inherit nodeEnv;
+}

pkgs/development/node-packages/generate.sh

@@ -2,3 +2,5 @@
 
 rm -f node-env.nix
 node2nix -i node-packages.json -o node-packages-v4.nix -c composition-v4.nix
+# node2nix doesn't explicitely support node v6 so far
+node2nix -5 -i node-packages.json -o node-packages-v6.nix -c composition-v6.nix