title: Why is npm install failing with node-sass related errors?
body: <p>I'm working with a rails application I inherited. I'm trying to run the <code>npm install</code> command but I keep getting the <strong>errors</strong> below. I tried running <code>npm rebuild node-sass</code> as suggested in the output but it did not help. I'm having this problem on <strong>Ubuntu 16</strong> as well as <strong>OS X</strong>.</p>
  
  <pre><code>&gt; cd client &amp;&amp; npm install
  
  npm WARN deprecated gulp-jscs@3.0.2: JSCS is deprecated. Switch to ESLint.
  npm WARN deprecated why-did-you-update@0.0.8: Package no longer supported. Please use @welldone-software/why-did-you-render instead.
  npm WARN deprecated chokidar@2.1.8: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies.
  npm WARN deprecated jscs-preset-wikimedia@1.0.1: No longer maintained. We recomment migrating to ESLint with eslint-config-wikimedia.
  npm WARN deprecated minimatch@2.0.10: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
  npm WARN deprecated core-js@1.2.7: core-js@&lt;3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.
  npm WARN deprecated nomnom@1.8.1: Package no longer supported. Contact support@npmjs.com for more info.
  
  &gt; railsapp@1.0.0 postinstall /Users/antarr/code/railsapp/client
  &gt; npm run build
  
  
  &gt; railsapp@1.0.0 build /Users/antarr/code/railsapp/client
  &gt; NODE_ENV=production webpack -p &amp;&amp; NODE_ENV=production gulp build
  
  Hash: b24f8ebb1737ed4fc3f1
  Version: webpack 1.15.0
  Time: 39385ms
                 Asset     Size  Chunks             Chunk Names
      client.bundle.js   949 kB       0  [emitted]  client
       tools.bundle.js   903 kB       1  [emitted]  tools
  client.bundle.js.map  6.62 MB       0  [emitted]  client
   tools.bundle.js.map  6.29 MB       1  [emitted]  tools
      + 913 hidden modules
  /Users/antarr/code/railsapp/client/node_modules/node-sass/lib/binding.js:15
        throw new Error(errors.missingBinary());
        ^
  
  Error: Missing binding /Users/antarr/code/railsapp/client/node_modules/node-sass/vendor/darwin-x64-48/binding.node
  Node Sass could not find a binding for your current environment: OS X 64-bit with Node.js 6.x
  
  Found bindings for the following environments:
    - OS X 64-bit with Unsupported runtime (83)
  
  This usually happens because your environment has changed since running `npm install`.
  Run `npm rebuild node-sass` to build the binding for your current environment.
      at module.exports (/Users/antarr/code/railsapp/client/node_modules/node-sass/lib/binding.js:15:13)
      at Object.&lt;anonymous&gt; (/Users/antarr/code/railsapp/client/node_modules/node-sass/lib/index.js:14:35)
      at Module._compile (module.js:556:32)
      at Object.Module._extensions..js (module.js:565:10)
      at Module.load (module.js:473:32)
      at tryModuleLoad (module.js:432:12)
      at Function.Module._load (module.js:424:3)
      at Module.require (module.js:483:17)
      at require (internal/module.js:20:19)
      at Object.&lt;anonymous&gt; (/Users/antarr/code/railsapp/client/node_modules/gulp-sass/index.js:187:21)
  
  npm ERR! Darwin 19.4.0
  npm ERR! argv "/Users/antarr/.nvm/versions/node/v6.6.0/bin/node" "/Users/antarr/.nvm/versions/node/v6.6.0/bin/npm" "run" "build"
  npm ERR! node v6.6.0
  npm ERR! npm  v3.10.3
  npm ERR! code ELIFECYCLE
  npm ERR! railsapp@1.0.0 build: `NODE_ENV=production webpack -p &amp;&amp; NODE_ENV=production gulp build`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the railsapp@1.0.0 build script 'NODE_ENV=production webpack -p &amp;&amp; NODE_ENV=production gulp build'.
  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 railsapp package,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     NODE_ENV=production webpack -p &amp;&amp; NODE_ENV=production gulp build
  npm ERR! You can get information on how to open an issue for this project with:
  npm ERR!     npm bugs railsapp
  npm ERR! Or if that isn't available, you can get their info via:
  npm ERR!     npm owner ls railsapp
  npm ERR! There is likely additional logging output above.
  
  npm ERR! Please include the following file with any support request:
  npm ERR!     /Users/antarr/code/railsapp/client/npm-debug.log
  
  npm ERR! Darwin 19.4.0
  npm ERR! argv "/Users/antarr/.nvm/versions/node/v6.6.0/bin/node" "/Users/antarr/.nvm/versions/node/v6.6.0/bin/npm" "install"
  npm ERR! node v6.6.0
  npm ERR! npm  v3.10.3
  npm ERR! code ELIFECYCLE
  npm ERR! railsapp@1.0.0 postinstall: `npm run build`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the railsapp@1.0.0 postinstall script 'npm run build'.
  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 railsapp package,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     npm run build
  npm ERR! You can get information on how to open an issue for this project with:
  npm ERR!     npm bugs railsapp
  npm ERR! Or if that isn't available, you can get their info via:
  npm ERR!     npm owner ls railsapp
  npm ERR! There is likely additional logging output above.
  
  npm ERR! Please include the following file with any support request:
  npm ERR!     /Users/antarr/code/railsapp/client/npm-debug.log
  
  npm ERR! Darwin 19.4.0
  npm ERR! argv "/Users/antarr/.nvm/versions/node/v6.6.0/bin/node" "/Users/antarr/.nvm/versions/node/v6.6.0/bin/npm" "install"
  npm ERR! node v6.6.0
  npm ERR! npm  v3.10.3
  npm ERR! code ELIFECYCLE
  npm ERR! railsapp@1.0.0 postinstall: `cd client &amp;&amp; npm install`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the railsapp@1.0.0 postinstall script 'cd client &amp;&amp; npm install'.
  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 railsapp package,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     cd client &amp;&amp; npm install
  npm ERR! You can get information on how to open an issue for this project with:
  npm ERR!     npm bugs railsapp
  npm ERR! Or if that isn't available, you can get their info via:
  npm ERR!     npm owner ls railsapp
  npm ERR! There is likely additional logging output above.
  
  npm ERR! Please include the following file with any support request:
  npm ERR!     /Users/antarr/code/railsapp/npm-debug.log
  </code></pre>
  
  <p><strong>package.json:</strong></p>
  
  <pre><code>{
    "name": "railsapp",
    "version": "1.0.0",
    "description": "...",
    "private": true,
    "engines": {
      "node": "6.6.0",
      "npm": "3.10.7"
    },
    "main": "server.js",
    "repository": {
      "type": "git",
      "url": ""
    },
    "scripts": {
      "postinstall": "cd client &amp;&amp; npm install",
      "build": "cd client &amp;&amp; npm run build",
      "build:dev": "cd client &amp;&amp; npm run build:dev",
      "watch": "cd client &amp;&amp; npm run watch",
      "gulp": "cd client &amp;&amp; gulp default --color",
      "gulp:hot": "cd client &amp;&amp; gulp hot --color",
      "gulp:express": "cd client &amp;&amp; gulp express --color",
      "gulp:live": "cd client &amp;&amp; gulp live --color",
      "start": "cd client &amp;&amp; npm start",
      "lint": "cd client &amp;&amp; npm run lint",
      "test": "bundle exec rake test &amp;&amp; (cd client &amp;&amp; npm run lint)",
      "express": "echo 'visit http://localhost:4000' &amp;&amp; (cd client &amp;&amp; npm start)",
      "rails": "(cd client &amp;&amp; npm run build:dev) &amp;&amp; rails s"
    },
    "author": "Mike R &lt;mike@railsapp.com&gt;",
    "bugs": {
      "url": ""
    },
    "homepage": "https://www.railsapp.com",
    "dependencies": {
      "postcss": "^7.0.30",
      "postcss-cssnext": "^3.1.0"
    }
  }
  
  </code></pre>
  
  <p><strong><em>Error after adding node-sass:</em></strong></p>
  
  <pre><code>    + 838 hidden modules
  gulp[7747]: ../src/node_contextify.cc:658:static void node::contextify::ContextifyScript::New(const v8::FunctionCallbackInfo&lt;v8::Value&gt;&amp;): Assertion `args[1]-&gt;IsString()' failed.
   1: 0xa0e670 node::Abort() [gulp]
   2: 0xa0e6ee  [gulp]
   3: 0xa006df node::contextify::ContextifyScript::New(v8::FunctionCallbackInfo&lt;v8::Value&gt; const&amp;) [gulp]
   4: 0xbf1fc1  [gulp]
   5: 0xbf2b52 v8::internal::Builtin_HandleApiCall(int, unsigned long*, v8::internal::Isolate*) [gulp]
   6: 0x13da5f9  [gulp]
  Aborted (core dumped)
  </code></pre>