I'm trying to install socket.io on centos 5 with node.js package manager. During installation I got an error:

"make: node-waf: Command not found"
and
"This is most likely a problem with the ws package"

# npm install socket.io
npm http GET https://registry.npmjs.org/socket.io
npm http 304 https://registry.npmjs.org/socket.io
npm http GET https://registry.npmjs.org/policyfile/0.0.4
npm http GET https://registry.npmjs.org/redis/0.6.7
npm http GET https://registry.npmjs.org/socket.io-client/0.9.2
npm http 304 https://registry.npmjs.org/policyfile/0.0.4
npm http 304 https://registry.npmjs.org/socket.io-client/0.9.2
npm http 304 https://registry.npmjs.org/redis/0.6.7
npm http GET https://registry.npmjs.org/uglify-js/1.2.5
npm http GET https://registry.npmjs.org/ws
npm http GET https://registry.npmjs.org/xmlhttprequest/1.2.2
npm http GET https://registry.npmjs.org/active-x-obfuscator/0.0.1
npm http 304 https://registry.npmjs.org/xmlhttprequest/1.2.2
npm http 304 https://registry.npmjs.org/uglify-js/1.2.5
npm http 304 https://registry.npmjs.org/ws
npm http 304 https://registry.npmjs.org/active-x-obfuscator/0.0.1
npm http GET https://registry.npmjs.org/zeparser/0.0.5

> [email protected] preinstall /root/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws
> make

**node-waf configure build
make: node-waf: Command not found
make: *** [all] Error 127**

npm ERR! [email protected] preinstall: `make`
npm ERR! `sh "-c" "make"` failed with 2
npm ERR! 
npm ERR! Failed at the [email protected] preinstall script.
npm ERR! This is most likely a problem with the ws package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     make
npm ERR! You can get their info via:
npm ERR!     npm owner ls ws
npm ERR! There is likely additional logging output above.
npm ERR! 
npm ERR! System Linux 2.6.18-194.17.4.el5
npm ERR! command "node" "/usr/bin/npm" "install" "socket.io"
npm ERR! cwd /root
npm ERR! node -v v0.6.13
npm ERR! npm -v 1.1.10
npm ERR! code ELIFECYCLE
npm ERR! message [email protected] preinstall: `make`
npm ERR! message `sh "-c" "make"` failed with 2
npm ERR! errno {}
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /root/npm-debug.log
npm not ok

What is "node-waf" and how can I solve this problem?

Thanks!