error on installing enyo-generator

npm install -g generator-enyo

gives this

npm WARN deprecated CSSselect@0.4.1: the module is now available as 'css-select'
npm WARN deprecated CSSwhat@0.4.7: the module is now available as 'css-what'
npm WARN deprecated graceful-fs@3.0.8: graceful-fs v3.0.0 and before will fail on node releases >= v7.0. Please update to graceful-fs@^4.0.0 as soon as possible. Use 'npm ls graceful-fs' to find it in the tree.
npm WARN deprecated lodash@1.0.2: lodash@<3.0.0 is no longer maintained. Upgrade to lodash@^4.0.0.
npm WARN deprecated graceful-fs@1.2.3: graceful-fs v3.0.0 and before will fail on node releases >= v7.0. Please update to graceful-fs@^4.0.0 as soon as possible. Use 'npm ls graceful-fs' to find it in the tree.

How do I fix these errors? Starting with graceful-fs, I tried this

npm install -g graceful-fs

but

npm ls -g graceful-fs

shows

/usr/local/lib
├─┬ cordova@6.1.1
│ ├─┬ cordova-lib@6.1.1
│ │ └─┬ npm@2.15.6
│ │   └── graceful-fs@4.1.4
│ └─┬ update-notifier@0.5.0
│   └─┬ configstore@1.4.0
│     └── graceful-fs@4.1.4
├─┬ enyo-dev@1.0.0
│ ├─┬ chokidar@1.5.1
│ │ └─┬ fsevents@1.0.12
│ │   └─┬ node-pre-gyp@0.6.25
│ │     └─┬ tar@2.2.1
│ │       └─┬ fstream@1.0.8
│ │         └── graceful-fs@4.1.3
│ └─┬ fs-extra@0.26.7
│   └── graceful-fs@4.1.4
├─┬ generator-enyo@1.0.3
│ └─┬ yeoman-generator@0.18.10
│   ├─┬ download@3.3.0
│   │ └─┬ vinyl-fs@0.3.14
│   │   ├─┬ glob-watcher@0.0.6
│   │   │ └─┬ gaze@0.5.2
│   │   │   └─┬ globule@0.1.0
│   │   │     └─┬ glob@3.1.21
49m
│   │   └── graceful-fs@3.0.8
│   └─┬ yeoman-environment@1.6.1
│     └─┬ mem-fs@1.1.3
│       └─┬ vinyl-file@2.0.0
│         └── graceful-fs@4.1.4
├── graceful-fs@4.1.4
├─┬ npm@3.8.9
│ └── graceful-fs@4.1.3
└─┬ yo@1.8.3
  └─┬ configstore@1.4.0
    └── graceful-fs@4.1.4

Why is graceful-fs in download@3.3.0 still at version 3.0.8?

enyojs / generator-enyo

error on installing enyo-generator #11