Installation fails on Node.js v6

[mathiasbynens]

fatal error: too many errors emitted, stopping now:

$ node -v
v6.2.1

$ npm -v
3.9.3

$ npm i gif2webp -g
npm http request GET https://registry.npmjs.org/gif2webp
npm http 200 https://registry.npmjs.org/gif2webp
npm http fetch GET https://registry.npmjs.org/gif2webp/-/gif2webp-0.1.5.tgz
npm http fetch 200 https://registry.npmjs.org/gif2webp/-/gif2webp-0.1.5.tgz

> [email protected] install /Users/mathias/.nvm/versions/node/v6.2.1/lib/node_modules/gif2webp
> node-gyp rebuild

gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
  CXX(target) Release/obj.target/gif2webp/src/gif2webp.o
../src/gif2webp.cpp:55:30: error: unknown type name 'Arguments'; did you
      mean 'v8::internal::Arguments'?
Handle<Value> convert (const Arguments& args) {
                             ^~~~~~~~~
                             v8::internal::Arguments
/Users/mathias/.node-gyp/6.2.1/include/node/v8.h:145:7: note:
      'v8::internal::Arguments' declared here
class Arguments;
      ^
../src/gif2webp.cpp:56:17: error: calling a protected constructor of class
      'v8::HandleScope'
    HandleScope scope;
                ^
/Users/mathias/.node-gyp/6.2.1/include/node/v8.h:904:13: note: declared
      protected here
  V8_INLINE HandleScope() {}
            ^
../src/gif2webp.cpp:58:13: error: member access into incomplete type 'const
      v8::internal::Arguments'
    if (args.Length() < 2) {
            ^
/Users/mathias/.node-gyp/6.2.1/include/node/v8.h:145:7: note: forward
      declaration of 'v8::internal::Arguments'
class Arguments;
      ^
../src/gif2webp.cpp:59:62: error: no member named 'New' in 'v8::String'
        return ThrowException (Exception::TypeError (String::New ("W...
                                                     ~~~~~~~~^
../src/gif2webp.cpp:62:15: error: type 'const v8::internal::Arguments' does
      not provide a subscript operator
    if (!args [0]->IsObject()) {
         ~~~~ ^~
../src/gif2webp.cpp:63:62: error: no member named 'New' in 'v8::String'
        return ThrowException (Exception::TypeError (String::New ("F...
                                                     ~~~~~~~~^
../src/gif2webp.cpp:66:15: error: type 'const v8::internal::Arguments' does
      not provide a subscript operator
    if (!args [1]->IsFunction()) {
         ~~~~ ^~
../src/gif2webp.cpp:67:62: error: no member named 'New' in 'v8::String'
        return ThrowException (Exception::TypeError (String::New ("S...
                                                     ~~~~~~~~^
../src/gif2webp.cpp:70:34: error: type 'const v8::internal::Arguments' does
      not provide a subscript operator
    Local<Object> options = args [0]->ToObject();
                            ~~~~ ^~
../src/gif2webp.cpp:72:71: error: no member named 'NewSymbol' in
      'v8::String'
  ...buffer = Local<Object>::Cast (options->Get (String::NewSymbol ("sour...
                                                 ~~~~~~~~^
../src/gif2webp.cpp:74:62: error: no member named 'New' in 'v8::String'
        return ThrowException (Exception::TypeError (String::New ("F...
                                                     ~~~~~~~~^
../src/gif2webp.cpp:79:32: error: no member named 'NewSymbol' in
      'v8::String'
    if (!options->Get (String::NewSymbol ("lossy"))->IsUndefined()) {
                       ~~~~~~~~^
../src/gif2webp.cpp:80:54: error: no member named 'NewSymbol' in
      'v8::String'
        Local<Boolean> value = options->Get (String::NewSymbol ("los...
                                             ~~~~~~~~^
../src/gif2webp.cpp:87:32: error: no member named 'NewSymbol' in
      'v8::String'
    if (!options->Get (String::NewSymbol ("mixed"))->IsUndefined()) {
                       ~~~~~~~~^
../src/gif2webp.cpp:88:54: error: no member named 'NewSymbol' in
      'v8::String'
        Local<Boolean> value = options->Get (String::NewSymbol ("mix...
                                             ~~~~~~~~^
../src/gif2webp.cpp:94:32: error: no member named 'NewSymbol' in
      'v8::String'
    if (!options->Get (String::NewSymbol ("quality"))->IsUndefined()) {
                       ~~~~~~~~^
../src/gif2webp.cpp:95:53: error: no member named 'NewSymbol' in
      'v8::String'
        Local<Number> value = options->Get (String::NewSymbol ("qual...
                                            ~~~~~~~~^
../src/gif2webp.cpp:102:32: error: no member named 'NewSymbol' in
      'v8::String'
    if (!options->Get (String::NewSymbol ("method"))->IsUndefined()) {
                       ~~~~~~~~^
../src/gif2webp.cpp:103:53: error: no member named 'NewSymbol' in
      'v8::String'
        Local<Number> value = options->Get (String::NewSymbol ("meth...
                                            ~~~~~~~~^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make: *** [Release/obj.target/gif2webp/src/gif2webp.o] Error 1
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/Users/mathias/.nvm/versions/node/v6.2.1/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:276:23)
gyp ERR! stack     at emitTwo (events.js:106:13)
gyp ERR! stack     at ChildProcess.emit (events.js:191:7)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:204:12)
gyp ERR! System Darwin 15.5.0
gyp ERR! command "/Users/mathias/.nvm/versions/node/v6.2.1/bin/node" "/Users/mathias/.nvm/versions/node/v6.2.1/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/mathias/.nvm/versions/node/v6.2.1/lib/node_modules/gif2webp
gyp ERR! node -v v6.2.1
gyp ERR! node-gyp -v v3.3.1
gyp ERR! not ok
npm ERR! Darwin 15.5.0
npm ERR! argv "/Users/mathias/.nvm/versions/node/v6.2.1/bin/node" "/Users/mathias/.nvm/versions/node/v6.2.1/bin/npm" "i" "gif2webp" "-g"
npm ERR! node v6.2.1
npm ERR! npm  v3.9.3
npm ERR! code ELIFECYCLE

npm ERR! [email protected] install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] install script 'node-gyp rebuild'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the gif2webp package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node-gyp rebuild
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs gif2webp
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls gif2webp
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     ~/tmp/npm-debug.log

[ghost]

I have the same error.