Failed to 'npm install' #5

npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! bignum@0.12.5 install: `node-pre-gyp install --fallback-to-build`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the bignum@0.12.5 install 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: