npm install: Failed at the node-sass#3.13.1 postinstall script - node.js

Question

I have a angular application: https://github.com/XBITSwitzerland/ngx-admin/tree/ng2-admin
And now I try to do: npm install
But I get this error (The compete Output of the command was way too long, so I just share here the last part):
gyp ERR! build error
gyp ERR! stack Error: `C:\Program Files (x86)\MSBuild\14.0\bin\msbuild.exe` failed with exit code: 1
gyp ERR! stack at ChildProcess.onExit (C:\github\ngx-admin\node_modules\node-gyp\lib\build.js:258:23)
gyp ERR! stack at ChildProcess.emit (events.js:182:13)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:240:12)
gyp ERR! System Windows_NT 10.0.17134
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\github\\ngx-admin\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd C:\github\ngx-admin\node_modules\wintersmith-sassy\node_modules\node-sass
gyp ERR! node -v v10.15.0
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok
Build failed with error code: 1
npm WARN ngx-toastr#4.4.1 requires a peer of #angular/core#^2.2.0 but none is installed. You must install peer dependencies yourself.
npm WARN ngx-toastr#4.4.1 requires a peer of #angular/common#^2.2.0 but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#1.2.4 (node_modules\webpack-dev-server\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#1.2.4 (node_modules\watchpack\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#1.1.2 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
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\danyb\AppData\Roaming\npm-cache\_logs\2019-01-29T18_25_12_699Z-debug.log
Does someone have an Idea why this error occurs and how to solve it?

Answer 1

If you run into this issue, read this page: https://www.bramvandenbulcke.be/en/kb/failed-node-sass3131-postinstall-script
The solution in my case:
1) Delete the package-lock.json file
2) npm install gulp-sass --save-dev
3) npm install node-sass#latest
Version specific notes:
node-sass#3.13.1 runs only on versions of Node.js up to v7 as stated in the release notes:

Answer 2

I think this is happening because you're missing the node-sass module. Try the following and rerun your build script and see if this resolves your issue:
npm install node-sass#latest
Also, I see you're using fsevents on a Windows platform, just a warning this module is only supported for Native access to OS X FSEvents

Answer 3

I had error node-sass#3.13.1 postinstall: node scripts/build.js on npm install after this message
> node scripts/install.js
Downloading binary from https://github.com/sass/node-sass/releases/download/v3.13.1/linux-x64-72_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v3.13.1/linux-x64-72_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
> core-js#2.6.9 postinstall /var/www/my/armat/www/node_modules/core-js
> node scripts/postinstall || echo "ignore"
and spent hours to find solution. I was trying to install it on laravel 5.2 that uses older versions of node and npm this helped me
$ npm install -g n
$ n 6.10.2 // selecting version you need in my case 6.10.2
$ npm install -g npm#3.10.10 // same for npm
hope this will help somebody else ^_^
#######UPDATE###########
nvm install 6.10.2
nvm use 6.10.2
npm install -g npm#3.10.10

Answer 4

only delete
package-lock.json
file
and do npm install again

Answer 5

I also received the same error
"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."
Solution:
I increased node-sass and gulp-sass versions to latest in package.json file, then issue got fixed.

Answer 6

If you scroll further up in the error output and you see something like:
gyp verb check python checking for Python executable "python2" in the PATH
gyp verb `which` failed Error: not found: python2
You can fix it on windows with the following steps:
delete node_modules folder
run npm install --global windows-build-toolsin powershell as admin
reinstalling node modules or node-sass with npm install

Answer 7

For me, problem was with the Linux directory permissions. Even with sudo and root user I couldn't make it work.
The solution to me was to change project directory owner as follows:
sudo chown my_user:my_user -R /path/to/project

Answer 8

Do the following commands respectively:
rm -rf package-lock.json
npm install node-sass#latest

Answer 9

For Ubuntu
Delete the package-lock.json file
sudo npm install gulp-sass --save-dev
sudo npm install node-sass#latest

Answer 10

If you use Visual Studio run following command:
npm cache clean --force
npm config set msvs_version 2019 --global
where 2019 is the version of Visual Studio

Answer 11

If you are using OpenBSD, that's because you need g++. Install it using
pkg_add g++
But, it gets installed as ec++, on /usr/local/bin, so you can copy, rename, or create a symlink to it using:
ln -s /usr/local/bin/ec++ /usr/local/bin/g++
Do the npm install again and it should work