I got a following error when I tried to watch coffee scripts by coffee -o js -cw coffee.

/usr/local/lib/node_modules/coffee-script/lib/coffee-script/command.js:321
        throw e;
              ^
Error: watch Unknown system errno 28
    at errnoException (fs.js:636:11)
    at FSWatcher.start (fs.js:663:11)
    at Object.watch (fs.js:691:11)
    at /usr/local/lib/node_modules/coffee-script/lib/coffee-script/command.js:287:27
    at Object.oncomplete (/usr/local/lib/node_modules/coffee-script/lib/coffee-script/command.js:100:11)

I have no idea what is going with error.

Then I checked the versions, coffee -v is 1.6.1 and node -v is v0.6.12.

According the official site( http://coffeescript.org/ ) the latest version is 1.6.3, so I wanted update coffee by npm update -g coffee-script, but this fails also.

npm WARN [email protected] package.json: bugs['name'] should probably be bugs['url']
npm http GET https://registry.npmjs.org/coffee-script
npm http 304 https://registry.npmjs.org/coffee-script

How can I update coffee script?

Edit 2013/10/11

In my coffee script directory there is only one file box_wrapper.coffee.

$ ->
  $("body").children().wrap ->
    "<div id='#{$(@).attr "id"}_box' class='wrapper'/>"

Edit 2013/10/16

I tried to re-install coffee, so I've done like this.

$ sudo npm -g rm coffee
npm WARN Not installed in /usr/local/lib/node_modules coffee
$ coffee -v
CoffeeScript version 1.6.1

I can't remove coffee. And I tried also like this.

$ sudo apt-get remove npm
$ npm -v
-bash: /usr/bin/npm: No such file or directory
$ sudo apt-get install npm
$ npm -v
1.1.4
$ sudo npm -g install coffee

# I omit a lot of `GET` parts.

npm http 304 https://registry.npmjs.org/mkdirp/0.3.4
npm ERR! error installing [email protected]
npm http 304 https://registry.npmjs.org/assertion-error/1.0.0
npm http 304 https://registry.npmjs.org/growl
npm http 304 https://registry.npmjs.org/jade/0.26.3
npm http 304 https://registry.npmjs.org/diff/1.0.2
npm http 304 https://registry.npmjs.org/mkdirp/0.3.5
npm http 304 https://registry.npmjs.org/glob/3.2.1
npm http 304 https://registry.npmjs.org/ms/0.3.0
npm ERR! error rolling back [email protected] Error: UNKNOWN, unknown error '/usr/local/lib/node_modules/coffee/node_modules/express'
npm ERR! error installing [email protected]

npm ERR! EEXIST, file already exists '/usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules'
npm ERR! File exists: /usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules
npm ERR! Move it away, and try again.
npm ERR! 
npm ERR! System Linux 3.2.0-54-generic-pae
npm ERR! command "node" "/usr/bin/npm" "-g" "install" "coffee"
npm ERR! cwd /home/ironsand
npm ERR! node -v v0.6.12
npm ERR! npm -v 1.1.4
npm ERR! path /usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules
npm ERR! fstream_path /usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules/___debug.npm
npm ERR! fstream_type Directory
npm ERR! fstream_class DirWriter
npm ERR! code EEXIST
npm ERR! message EEXIST, file already exists '/usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules'
npm ERR! errno {}
npm ERR! fstream_stack /usr/lib/nodejs/fstream/lib/writer.js:161:23
npm ERR! fstream_stack Object.oncomplete (/usr/lib/nodejs/mkdirp.js:34:53)

npm ERR! EEXIST, file already exists '/usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules'
npm ERR! File exists: /usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules
npm ERR! Move it away, and try again.
npm ERR! 
npm ERR! System Linux 3.2.0-54-generic-pae
npm ERR! command "node" "/usr/bin/npm" "-g" "install" "coffee"
npm ERR! cwd /home/ironsand
npm ERR! node -v v0.6.12
npm ERR! npm -v 1.1.4
npm ERR! path /usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules
npm ERR! fstream_path /usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules/___debug.npm
npm ERR! fstream_type Directory
npm ERR! fstream_class DirWriter
npm ERR! code EEXIST
npm ERR! message EEXIST, file already exists '/usr/local/lib/node_modules/coffee/node_modules/mocha/node_modules'
npm ERR! errno {}
npm ERR! fstream_stack /usr/lib/nodejs/fstream/lib/writer.js:161:23
npm ERR! fstream_stack Object.oncomplete (/usr/lib/nodejs/mkdirp.js:34:53)
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /home/ironsand/npm-debug.log
npm not ok

And npm-debug.log is a blank file.