I use cygwin on windows 8.1 to have an Unix shell. But I cannot run commands such as npm from it.

What should I do to do it? Add some kind of env var to cygwin? Why it doesn't use windows PATH?

Edit:
Actually I think that I misunderstood the problem here. It looks like npm is found by cygwin but it cannot be used. For instance I can use git from cygwin without any trouble.

```
$ npm
/cygdrive/d/Logiciels installés/nodejs/npm: line 2: $'\r' : command not found
/cygdrive/d/Logiciels installés/nodejs/npm: line 4: $'\r' : command not found
/cygdrive/d/Logiciels installés/nodejs/npm: line 5: Syntax error around « $'in\r' »
'cygdrive/d/Logiciels installés/nodejs/npm: line 5: `case `uname` in

```

So, it looks actually more like a npm issue.