title: Cannot find module ‘gulp-sass’
body: <p>I have a problem to run the wittr in a node server. It shows an error - Cannot find module ‘gulp-sass’. When I open <a href="http://127.0.0.1:8080/1" rel="nofollow noreferrer">http://127.0.0.1:8080/1</a> the server that I installed with cdm only shows the directory of the cloned repo from a course. Thank you for resolving it.
  Repo: <a href="https://github.com/jakearchibald/wittr" rel="nofollow noreferrer">https://github.com/jakearchibald/wittr</a></p>
  
  <pre><code>0 info it worked if it ends with ok
  1 verbose cli [ 'C:\\Program Files\\nodejs\\node.exe',
  1 verbose cli   'C:\\Users\\Freeware Sys\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js',
  1 verbose cli   'run',
  1 verbose cli   'serve' ]
  2 info using npm@5.5.1
  3 info using node@v8.9.0
  4 verbose run-script [ 'preserve', 'serve', 'postserve' ]
  5 info lifecycle wittr@1.0.0~preserve: wittr@1.0.0
  6 info lifecycle wittr@1.0.0~serve: wittr@1.0.0
  7 verbose lifecycle wittr@1.0.0~serve: unsafe-perm in lifecycle true
  8 verbose lifecycle wittr@1.0.0~serve: PATH: C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\bin\node-gyp-bin;C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\.bin;C:\Users\Freeware Sys\bin;C:\Program Files\Git\mingw64\bin;C:\Program Files\Git\usr\local\bin;C:\Program Files\Git\usr\bin;C:\Program Files\Git\usr\bin;C:\Program Files\Git\mingw64\bin;C:\Program Files\Git\usr\bin;C:\Users\Freeware Sys\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\Program Files (x86)\Brackets\command;C:\Program Files\Git\cmd;C:\Program Files\nodejs;C:\Users\Freeware Sys\AppData\Local\Microsoft\WindowsApps;C:\Users\Freeware Sys\AppData\Local\atom\bin;C:\Users\Freeware Sys\AppData\Roaming\npm;C:\Program Files\Git\usr\bin\vendor_perl;C:\Program Files\Git\usr\bin\core_perl
  9 verbose lifecycle wittr@1.0.0~serve: CWD: C:\Users\Freeware Sys\Desktop\Coding Staff\wittr
  10 silly lifecycle wittr@1.0.0~serve: Args: [ '/d /s /c', 'gulp serve' ]
  11 silly lifecycle wittr@1.0.0~serve: Returned: code: 1  signal: null
  12 info lifecycle wittr@1.0.0~serve: Failed to exec serve script
  13 verbose stack Error: wittr@1.0.0 serve: `gulp serve`
  13 verbose stack Exit status 1
  13 verbose stack     at EventEmitter.&lt;anonymous&gt; (C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\index.js:280:16)
  13 verbose stack     at emitTwo (events.js:126:13)
  13 verbose stack     at EventEmitter.emit (events.js:214:7)
  13 verbose stack     at ChildProcess.&lt;anonymous&gt; (C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14)
  13 verbose stack     at emitTwo (events.js:126:13)
  13 verbose stack     at ChildProcess.emit (events.js:214:7)
  13 verbose stack     at maybeClose (internal/child_process.js:925:16)
  13 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
  14 verbose pkgid wittr@1.0.0
  15 verbose cwd C:\Users\Freeware Sys\Desktop\Coding Staff\wittr
  16 verbose Windows_NT 10.0.15063
  17 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\Freeware Sys\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "run" "serve"
  18 verbose node v8.9.0
  19 verbose npm  v5.5.1
  20 error code ELIFECYCLE
  21 error errno 1
  22 error wittr@1.0.0 serve: `gulp serve`
  22 error Exit status 1
  23 error Failed at the wittr@1.0.0 serve script.
  23 error This is probably not a problem with npm. There is likely additional logging output above.
  24 verbose exit [ 1, true ]
  </code></pre>
  
  <p>After npm i:</p>
  
  <pre><code>$ npm i
  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 minimatch@0.2.14: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
  npm WARN deprecated graceful-fs@1.2.3: graceful-fs v3.0.0 and before will fail on node releases &gt;= 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.
  
  &gt; bufferutil@1.2.1 install C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\bufferutil
  &gt; node-gyp rebuild
  
  
  C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\bufferutil&gt;if not defined npm_config_node_gyp (node "C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\bin\node-gyp-bin\\..\..\node_modules\node-gyp\bin\node-gyp.js" rebuild )  else (node "" rebuild )
  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 (C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:483:19)
  gyp ERR! stack     at PythonFinder.&lt;anonymous&gt; (C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:508:16)
  gyp ERR! stack     at C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\node_modules\graceful-fs\polyfills.js:284:29
  gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:152:21)
  gyp ERR! System Windows_NT 10.0.15063
  gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\Freeware Sys\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
  gyp ERR! cwd C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\bufferutil
  gyp ERR! node -v v8.9.0
  gyp ERR! node-gyp -v v3.6.2
  gyp ERR! not ok
  
  &gt; utf-8-validate@1.2.2 install C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\utf-8-validate
  &gt; node-gyp rebuild
  
  
  C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\utf-8-validate&gt;if not defined npm_config_node_gyp (node "C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\bin\node-gyp-bin\\..\..\node_modules\node-gyp\bin\node-gyp.js" rebuild )  else (node "" rebuild )
  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 (C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:483:19)
  gyp ERR! stack     at PythonFinder.&lt;anonymous&gt; (C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:508:16)
  gyp ERR! stack     at C:\Users\Freeware Sys\AppData\Roaming\npm\node_modules\npm\node_modules\graceful-fs\polyfills.js:284:29
  gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:152:21)
  gyp ERR! System Windows_NT 10.0.15063
  gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\Freeware Sys\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
  gyp ERR! cwd C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\utf-8-validate
  gyp ERR! node -v v8.9.0
  gyp ERR! node-gyp -v v3.6.2
  gyp ERR! not ok
  
  &gt; node-sass@3.13.1 install C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\node-sass
  &gt; node scripts/install.js
  
  Downloading binary from https://github.com/sass/node-sass/releases/download/v3.13.1/win32-x64-57_binding.node
  Cannot download "https://github.com/sass/node-sass/releases/download/v3.13.1/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; node-sass@3.13.1 postinstall C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\node-sass
  &gt; node scripts/build.js
  
  Building: C:\Program Files\nodejs\node.exe C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
  gyp info it worked if it ends with ok
  gyp verb cli [ 'C:\\Program Files\\nodejs\\node.exe',
  gyp verb cli   'C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\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@8.9.0 | 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 (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:13:12)
  gyp verb `which` failed     at F (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:68:19)
  gyp verb `which` failed     at E (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:80:29)
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:89:16
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\isexe\index.js:42:5
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\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 (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:13:12)
  gyp verb `which` failed     at F (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:68:19)
  gyp verb `which` failed     at E (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:80:29)
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:89:16
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\isexe\index.js:42:5
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\isexe\windows.js:36:5
  gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21)
  gyp verb `which` failed   stack: 'Error: not found: python2\n    at getNotFoundError (C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\which\\which.js:13:12)\n    at F (C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\which\\which.js:68:19)\n    at E (C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\which\\which.js:80:29)\n    at C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\which\\which.js:89:16\n    at C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\isexe\\index.js:42:5\n    at C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\isexe\\windows.js:36:5\n    at FSReqWrap.oncomplete (fs.js:152:21)',
  gyp verb `which` failed   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 (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:13:12)
  gyp verb `which` failed     at F (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:68:19)
  gyp verb `which` failed     at E (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:80:29)
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:89:16
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\isexe\index.js:42:5
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\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 (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:13:12)
  gyp verb `which` failed     at F (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:68:19)
  gyp verb `which` failed     at E (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:80:29)
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\which\which.js:89:16
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\isexe\index.js:42:5
  gyp verb `which` failed     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\isexe\windows.js:36:5
  gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21)
  gyp verb `which` failed   stack: 'Error: not found: python\n    at getNotFoundError (C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\which\\which.js:13:12)\n    at F (C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\which\\which.js:68:19)\n    at E (C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\which\\which.js:80:29)\n    at C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\which\\which.js:89:16\n    at C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\isexe\\index.js:42:5\n    at C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\isexe\\windows.js:36:5\n    at FSReqWrap.oncomplete (fs.js:152:21)',
  gyp verb `which` failed   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 (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\node-gyp\lib\configure.js:483:19)
  gyp ERR! stack     at PythonFinder.&lt;anonymous&gt; (C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\node-gyp\lib\configure.js:508:16)
  gyp ERR! stack     at C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\graceful-fs\polyfills.js:284:29
  gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:152:21)
  gyp ERR! System Windows_NT 10.0.15063
  gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
  gyp ERR! cwd C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\node-sass
  gyp ERR! node -v v8.9.0
  gyp ERR! node-gyp -v v3.6.2
  gyp ERR! not ok
  Build failed with error code: 1
  npm WARN Error: EPERM: operation not permitted, lstat 'C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\cryptiles\node_modules'
  npm WARN  { Error: EPERM: operation not permitted, lstat 'C:\Users\Freeware Sys\Desktop\Coding Staff\wittr\node_modules\cryptiles\node_modules'
  npm WARN   stack: 'Error: EPERM: operation not permitted, lstat \'C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\cryptiles\\node_modules\'',
  npm WARN   errno: -4048,
  npm WARN   code: 'EPERM',
  npm WARN   syscall: 'lstat',
  npm WARN   path: 'C:\\Users\\Freeware Sys\\Desktop\\Coding Staff\\wittr\\node_modules\\cryptiles\\node_modules' }
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! node-sass@3.13.1 postinstall: `node scripts/build.js`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the node-sass@3.13.1 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\Freeware Sys\AppData\Roaming\npm-cache\_logs\2017-11-07T11_48_46_250Z-debug.log
  </code></pre>