Error when executing: npm install

[inthearmsofsleep]

Hi,

I've got the following error:
(...)
(some warnings...)

npm ERR! code ENOENT
npm ERR! syscall spawn git
npm ERR! path git
npm ERR! errno -4058
npm ERR! enoent Error while executing:
npm ERR! enoent undefined ls-remote -h -t https://github.com/debris/bignumber.js.git
npm ERR! enoent
npm ERR! enoent
npm ERR! enoent spawn git ENOENT
npm ERR! enoent This is related to npm not being able to find a file.
npm ERR! enoent

What might be the problem? Tks