npm run build doesn't work on Windows

[Cleanshooter]

SET NODE_ENV=production & gulp release

[16:36:17] Using gulpfile ~\Documents\Projects\example-project\gulpfile.js [16:36:17] Starting 'publish:tag'... [16:36:17] Starting 'publish:npm'... [16:36:17] Starting 'build:example:files'... [16:36:17] Starting 'build:example:css'... [16:36:17] Starting 'build:example:scripts'... events.js:160 throw er; // Unhandled 'error' event ^

Error: spawn npm ENOENT at exports._errnoException (util.js:1026:11) at Process.ChildProcess._handle.onexit (internal/child_process.js:193:32) at onErrorNT (internal/child_process.js:359:16) at _combinedTickCallback (internal/process/next_tick.js:74:11) at process._tickCallback (internal/process/next_tick.js:98:9) at Module.runMain (module.js:606:11) at run (bootstrap_node.js:394:7) at startup (bootstrap_node.js:149:9) at bootstrap_node.js:509:3

npm ERR! Windows_NT 10.0.14393 npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Users\Moto\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js" "run" "release" npm ERR! node v6.9.1 npm ERR! npm v4.0.2 npm ERR! code ELIFECYCLE npm ERR! [email protected] release: SET NODE_ENV=production & gulp release npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the [email protected] release script 'SET NODE_ENV=production & gulp release'. 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 react-material-grid package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! SET NODE_ENV=production & gulp release npm ERR! You can get information on how to open an issue for this project with: npm ERR! npm bugs react-material-grid npm ERR! Or if that isn't available, you can get their info via: npm ERR! npm owner ls react-material-grid npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request: npm ERR! C:\Users\Moto\Documents\Projects\example-project\npm-debug.log