error 'env' is not recognized as an internal or external command?

Question

I am new to node.js i have installed node.js and checked its working fine using commend npm -v , I tried to test it build open source poject from

github https://github.com/quran/quran.com-frontend

the command to run the project was

  npm run dev

I got this error

    C:\Users\Acer\Desktop\quran.com-frontend-master\quran.com-frontend-master>npm run dev

    > [email protected] dev C:\Users\Acer\Desktop\quran.com-frontend-master\quran.com-frontend-master
    > env NODE_PATH='./src' PORT=8000 UV_THREADPOOL_SIZE=100 node ./webpack/webpack-dev-server.js & env NODE_PATH='./src' PORT=8000 node ./bin/server.js

    'env' is not recognized as an internal or external command,
    operable program or batch file.
    'env' is not recognized as an internal or external command,
    operable program or batch file.

    npm ERR! Windows_NT 10.0.14393
    npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "dev"
    npm ERR! node v6.9.2
    npm ERR! npm  v3.10.9
    npm ERR! code ELIFECYCLE
    npm ERR! [email protected] dev: `env NODE_PATH='./src' PORT=8000 UV_THREADPOOL_SIZE=100 node ./webpack/webpack-dev-server.js & env NODE_PATH='./src' PORT=8000 node ./bin/server.js`
    npm ERR! Exit status 1
    npm ERR!
    npm ERR! Failed at the [email protected] dev script 'env NODE_PATH='./src' PORT=8000 UV_THREADPOOL_SIZE=100 node ./webpack/webpack-dev-server.js & env NODE_PATH='./src' PORT=8000 node ./bin/server.js'.
    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 quran package,
    npm ERR! not with npm itself.
    npm ERR! Tell the author that this fails on your system:
    npm ERR!     env NODE_PATH='./src' PORT=8000 UV_THREADPOOL_SIZE=100 node ./webpack/webpack-dev-server.js & env NODE_PATH='./src' PORT=8000 node ./bin/server.js
    npm ERR! You can get information on how to open an issue for this project with:
    npm ERR!     npm bugs quran
    npm ERR! Or if that isn't available, you can get their info via:
    npm ERR!     npm owner ls quran
    npm ERR! There is likely additional logging output above.
    npm WARN Local package.json exists, but node_modules missing, did you mean to install?

    npm ERR! Please include the following file with any support request:
    npm ERR!     C:\Users\Acer\Desktop\quran.com-frontend-master\quran.com-frontend-master\npm-debug.log

Answer 1

On windows, the 'env' command it is NOT recognized by default; there I've found two options:

1. Use another command instead, for instance:

    set VARIABLE_NAME=custom name

2. Install cygwin and set it's installation path to the windows environment variables. After installing you can use from command line:

    env VARIABLE_NAME=custom name

Here is the link with details for cygwin installation: https://www.howtogeek.com/howto/41382/how-to-use-linux-commands-in-windows-with-cygwin/