Can't install aglio

Hi ! I have troubles installing agile with my configuration. I don't really know what to do. Can you help ?

```
➜ ~ sudo npm install -g aglio
Password:
npm WARN deprecated jade@1.11.0: Jade has been renamed to pug, please install the latest version of pug instead of jade
npm WARN deprecated transformers@2.1.0: Deprecated, use jstransformer
npm WARN deprecated minimatch@0.3.0: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
/usr/local/bin/aglio -> /usr/local/lib/node_modules/aglio/bin/aglio.js

> fsevents@1.1.3 install /usr/local/lib/node_modules/aglio/node_modules/fsevents
> node install

shell-init: error retrieving current directory: getcwd: cannot access parent directories: Permission denied
path.js:1180
cwd = process.cwd();
^

Error: EACCES: permission denied, uv_cwd
at Object.resolve (path.js:1180:25)
at startup (bootstrap_node.js:172:32)
at bootstrap_node.js:613:3

> protagonist@1.6.8 install /usr/local/lib/node_modules/aglio/node_modules/protagonist
> node-gyp rebuild

shell-init: error retrieving current directory: getcwd: cannot access parent directories: Permission denied
sh: node-gyp: command not found

> aglio-theme-olio@1.6.3 postinstall /usr/local/lib/node_modules/aglio/node_modules/aglio-theme-olio
> node scripts/setup-cache.js

shell-init: error retrieving current directory: getcwd: cannot access parent directories: Permission denied
path.js:1180
cwd = process.cwd();
^

Error: EACCES: permission denied, uv_cwd
at Object.resolve (path.js:1180:25)
at startup (bootstrap_node.js:172:32)
at bootstrap_node.js:613:3
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.3 (node_modules/aglio/node_modules/fsevents):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.3 install: `node install`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: protagonist@1.6.8 (node_modules/aglio/node_modules/protagonist):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: protagonist@1.6.8 install: `node-gyp rebuild`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: spawn ENOENT

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! aglio-theme-olio@1.6.3 postinstall: `node scripts/setup-cache.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the aglio-theme-olio@1.6.3 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/mathieuleroy/.npm/_logs/2017-11-24T01_21_12_402Z-debug.log
```