NPM Installation issue

Hi,

I’m unable to run the command npm install and getting below error. Kindly help resolve the same.

node version - v10.16.3
npm version - 6.9.0
OS - Windows 10 Enterprise

Error details:

node-sass@4.10.0 install G:\pre-dev\NWL\Static\frontend\node_modules\node-sass
node scripts/install.js

Downloading binary from https://github.com/sass/node-sass/releases/download/v4.10.0/win32-x64-64_binding.node
Cannot download “https://github.com/sass/node-sass/releases/download/v4.10.0/win32-x64-64_binding.node”:

tunneling socket could not be established, statusCode=407

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

node-sass@4.10.0 postinstall G:\pre-dev\NWL\Static\frontend\node_modules\node-sass
node scripts/build.js

Building: C:\Program Files\nodejs\node.exe G:\pre-dev\NWL\Static\frontend\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 ‘G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\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@3.8.0
gyp info using node@10.16.3 | 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 (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:13:12)
gyp verb which failed at F (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:68:19)
gyp verb which failed at E (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:80:29)
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:89:16
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\isexe\index.js:42:5
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\isexe\windows.js:36:5
gyp verb which failed at FSReqWrap.oncomplete (fs.js:153:21)
gyp verb which failed python2 { Error: not found: python2
gyp verb which failed at getNotFoundError (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:13:12)
gyp verb which failed at F (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:68:19)
gyp verb which failed at E (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:80:29)
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:89:16
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\isexe\index.js:42:5
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\isexe\windows.js:36:5
gyp verb which failed at FSReqWrap.oncomplete (fs.js:153:21)
gyp verb which failed stack:
gyp verb which failed ‘Error: not found: python2\n at getNotFoundError (G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\which\which.js:13:12)\n at F (G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\which\which.js:68:19)\n at E (G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\which\which.js:80:29)\n at G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\which\which.js:89:16\n at G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\isexe\index.js:42:5\n at G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\isexe\windows.js:36:5\n at FSReqWrap.oncomplete (fs.js:153:21)’,
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 (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:13:12)
gyp verb which failed at F (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:68:19)
gyp verb which failed at E (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:80:29)
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:89:16
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\isexe\index.js:42:5
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\isexe\windows.js:36:5
gyp verb which failed at FSReqWrap.oncomplete (fs.js:153:21)
gyp verb which failed python { Error: not found: python
gyp verb which failed at getNotFoundError (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:13:12)
gyp verb which failed at F (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:68:19)
gyp verb which failed at E (G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:80:29)
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\which\which.js:89:16
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\isexe\index.js:42:5
gyp verb which failed at G:\pre-dev\NWL\Static\frontend\node_modules\isexe\windows.js:36:5
gyp verb which failed at FSReqWrap.oncomplete (fs.js:153:21)
gyp verb which failed stack:
gyp verb which failed ‘Error: not found: python\n at getNotFoundError (G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\which\which.js:13:12)\n at F (G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\which\which.js:68:19)\n at E (G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\which\which.js:80:29)\n at G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\which\which.js:89:16\n at G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\isexe\index.js:42:5\n at G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\isexe\windows.js:36:5\n at FSReqWrap.oncomplete (fs.js:153:21)’,
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 (G:\pre-dev\NWL\Static\frontend\node_modules\node-gyp\lib\configure.js:484:19)
gyp ERR! stack at PythonFinder. (G:\pre-dev\NWL\Static\frontend\node_modules\node-gyp\lib\configure.js:509:16)
gyp ERR! stack at G:\pre-dev\NWL\Static\frontend\node_modules\graceful-fs\polyfills.js:282:31
gyp ERR! stack at FSReqWrap.oncomplete (fs.js:153:21)
gyp ERR! System Windows_NT 10.0.17134
gyp ERR! command “C:\Program Files\nodejs\node.exe” “G:\NWL\Solutions\NWG.Azure.ThinkDigital\pre-dev\NWL\Static\frontend\node_modules\node-gyp\bin\node-gyp.js” “rebuild” “–verbose” “–libsass_ext=” “–libsass_cflags=” “–libsass_ldflags=” “–libsass_library=”
gyp ERR! cwd G:\pre-dev\NWL\Static\frontend\node_modules\node-sass
gyp ERR! node -v v10.16.3
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
Build failed with error code: 1
npm WARN rollback Rolling back source-map@0.4.4 failed (this is probably harmless): EPERM: operation not permitted, lstat ‘G:\pre-dev\NWL\Static\frontend\node_modules\scss-tokenizer\node_modules’
npm WARN is-in-viewport@3.0.4 requires a peer of jquery@>1.7.0 but none is installed. You must install peer dependencies yourself.
npm WARN unminified-webpack-plugin@2.0.0 requires a peer of webpack@^4.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.9 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {“os”:“darwin”,“arch”:“any”} (current: {“os”:“win32”,“arch”:“x64”})

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.10.0 postinstall: node scripts/build.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.10.0 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\xyz\AppData\Roaming\npm-cache_logs\2019-10-25T10_42_13_039Z-debug.log

Thanks,
Kalyan

There is some proxy troubleshooting advice here: Common proxy and networking problems

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