title: Ionic 2 - Error while installing node_modules with npm install?
body: <p>I've installed latest <a href="https://nodejs.org/dist/v8.1.0/node-v8.1.0-x64.msi" rel="nofollow noreferrer">Node JS ( v 8.1.0 )</a>, Ionic and Cordova then tried to install <code>node_modules</code> using <code>npm install</code> command in ionic demo tab project created using <code>ionic start myApp tabs</code> and I got the following error. I'm using <em>Windows 10 Pro</em>.  I have tried lot but yet to resolve the worry. any help would be greatly appreciated.</p>
  
  <pre><code>npm install
  ✖ Running command - failed!
  [ERROR] An error occurred while running npm install (exit code 1):
  
          npm WARN prefer global node-gyp@3.6.2 should be installed with -g
  
          &gt; node-sass@4.5.0 install E:\Hybrid Project Locker\NFB\node_modules\node-sass
          &gt; node scripts/install.js
  
          Downloading binary from https://github.com/sass/node-sass/releases/download/v4.5.0/win32-x64-57_binding.node
          Cannot download "https://github.com/sass/node-sass/releases/download/v4.5.0/win32-x64-57_binding.node":
  
          HTTP error 404 Not Found
  
          Hint: If github.com is not accessible in your location
                try setting a proxy via HTTP_PROXY, e.g.
  
                export HTTP_PROXY=http://example.com:1234
  
          or configure npm proxy via
  
                npm config set proxy http://example.com:8080
  
          &gt; fsevents@1.1.1 install E:\Hybrid Project Locker\NFB\node_modules\fsevents
          &gt; node install
  
  
          &gt; node-sass@4.5.0 postinstall E:\Hybrid Project Locker\NFB\node_modules\node-sass
          &gt; node scripts/build.js
  
          Building: C:\Program Files\nodejs\node.exe E:\Hybrid Project Locker\NFB\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldf
  lags= --libsass_library=
          gyp info it worked if it ends with ok
          gyp verb cli [ 'C:\\Program Files\\nodejs\\node.exe',
          gyp verb cli   'E:\\Hybrid Project Locker\\NFB\\node_modules\\node-gyp\\bin\\node-gyp.js',
          gyp verb cli   'rebuild',
          gyp verb cli   '--verbose',
          gyp verb cli   '--libsass_ext=',
          gyp verb cli   '--libsass_cflags=',
          gyp verb cli   '--libsass_ldflags=',
          gyp verb cli   '--libsass_library=' ]
          gyp info using node-gyp@3.6.2
          gyp info using node@8.1.0 | win32 | x64
          gyp verb command rebuild []
          gyp verb command clean []
          gyp verb clean removing "build" directory
          gyp verb command configure []
          gyp verb check python checking for Python executable "python2" in the PATH
          gyp verb `which` failed Error: not found: python2
          gyp verb `which` failed     at getNotFoundError (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:13:12)
          gyp verb `which` failed     at F (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:68:19)
          gyp verb `which` failed     at E (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:80:29)
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\which\which.js:89:16
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\isexe\index.js:42:5
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\isexe\windows.js:36:5
          gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21)
          gyp verb `which` failed  python2 { Error: not found: python2
          gyp verb `which` failed     at getNotFoundError (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:13:12)
          gyp verb `which` failed     at F (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:68:19)
          gyp verb `which` failed     at E (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:80:29)
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\which\which.js:89:16
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\isexe\index.js:42:5
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\isexe\windows.js:36:5
          gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21) code: 'ENOENT' }
          gyp verb check python checking for Python executable "python" in the PATH
          gyp verb `which` failed Error: not found: python
          gyp verb `which` failed     at getNotFoundError (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:13:12)
          gyp verb `which` failed     at F (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:68:19)
          gyp verb `which` failed     at E (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:80:29)
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\which\which.js:89:16
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\isexe\index.js:42:5
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\isexe\windows.js:36:5
          gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21)
          gyp verb `which` failed  python { Error: not found: python
          gyp verb `which` failed     at getNotFoundError (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:13:12)
          gyp verb `which` failed     at F (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:68:19)
          gyp verb `which` failed     at E (E:\Hybrid Project Locker\NFB\node_modules\which\which.js:80:29)
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\which\which.js:89:16
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\isexe\index.js:42:5
          gyp verb `which` failed     at E:\Hybrid Project Locker\NFB\node_modules\isexe\windows.js:36:5
          gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21) code: 'ENOENT' }
          gyp verb could not find "python". checking python launcher
          gyp verb could not find "python". guessing location
          gyp verb ensuring that file exists: C:\Python27\python.exe
          gyp ERR! configure error
          gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
          gyp ERR! stack     at PythonFinder.failNoPython (E:\Hybrid Project Locker\NFB\node_modules\node-gyp\lib\configure.js:483:19)
          gyp ERR! stack     at PythonFinder.&lt;anonymous&gt; (E:\Hybrid Project Locker\NFB\node_modules\node-gyp\lib\configure.js:508:16)
          gyp ERR! stack     at E:\Hybrid Project Locker\NFB\node_modules\graceful-fs\polyfills.js:284:29
          gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:152:21)
          gyp ERR! System Windows_NT 10.0.10586
          gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "E:\\Hybrid Project Locker\\NFB\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--li
  bsass_cflags=" "--libsass_ldflags=" "--libsass_library="
          gyp ERR! cwd E:\Hybrid Project Locker\NFB\node_modules\node-sass
          gyp ERR! node -v v8.1.0
          gyp ERR! node-gyp -v v3.6.2
          gyp ERR! not ok
          Build failed with error code: 1
          npm WARN @angular/http@2.4.10 requires a peer of @angular/platform-browser@2.4.10 but none was installed.
          npm WARN @ionic/cli-plugin-ionic-angular@1.3.0 requires a peer of @ionic/app-scripts@^1.3.7 but none was installed.
          npm WARN cordova-ios@4.4.0 had bundled packages that do not match the required version(s). They have been replaced with non-bundled versions.
  
          npm ERR! code ELIFECYCLE
          npm ERR! errno 1
          npm ERR! node-sass@4.5.0 postinstall: `node scripts/build.js`
          npm ERR! Exit status 1
          npm ERR!
          npm ERR! Failed at the node-sass@4.5.0 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!     C:\Users\Anoop M\AppData\Roaming\npm-cache\_logs\2017-06-10T00_37_25_356Z-debug.log
  </code></pre>