npm install fails

[mindrones]

Cannot run npm install as I get:

> aframe-inspector@0.9.1 prepublish C:\Users\vrig\Dev\repositories\aframe\aframe-inspector
> npm run dist
> aframe-inspector@0.9.1 dist C:\Users\vrig\Dev\repositories\aframe\aframe-inspector
> npm run dist:max && npm run dist:min
> aframe-inspector@0.9.1 dist:max C:\Users\vrig\Dev\repositories\aframe\aframe-inspector
> cross-env AFRAME_DIST=true npm run build
> aframe-inspector@0.9.1 build C:\Users\vrig\Dev\repositories\aframe\aframe-inspector
> NODE_ENV=production cross-env webpack --progress --colors
'NODE_ENV' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 1