title: Can't install node-sass
body: <p>I am attempting to install node-sass and it just won't let me. I have tried updating npm. </p>
  
  <p>I put this in: </p>
  
  <p>sudo npm install -g node-sass</p>
  
  <p>and i get this (starting one line before the error): </p>
  
  <pre><code>gyp verb build dir attempting to create "build" dir: 
  /Users/matt/node_modules/node-sass/build
  gyp ERR! configure error
  gyp ERR! stack Error: EACCES: permission denied, mkdir 
  '/Users/matt/node_modules/node-sass/build'
  gyp ERR! System Darwin 17.7.0
  gyp ERR! command "/usr/local/bin/node" 
  "/Users/matt/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "- 
  -verbose" "--libsass_ext=" "--libsass_cflags=" "-- 
  libsass_ldflags=" "--libsass_library="
  gyp ERR! cwd /Users/matt/node_modules/node-sass
  gyp ERR! node -v v8.11.1
  gyp ERR! node-gyp -v v3.7.0
  gyp ERR! not ok
  Build failed with error code: 1
  npm WARN enoent ENOENT: no such file or directory, open                     
  '/Users/matt/package.json'
  npm WARN ajv-keywords@3.2.0 requires a peer of ajv@^6.0.0 but         
  none is installed. You must install peer dependencies yourself.
  npm WARN matt No description
  npm WARN matt No repository field.
  npm WARN matt No README data
  npm WARN matt No license field.
  
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! node-sass@4.9.2 postinstall: `node scripts/build.js`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the node-sass@4.9.2 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/matt/.npm/_logs/2018-08-02T16_18_15_228Z- 
  debug.log
  </code></pre>