Error while installing on Mac OSX 10.7 Lion

gistfile1.txt

H-arts-iMac:nodetest fcodello$ sudo curl http://npmjs.org/install.sh | sh
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  7031  100  7031    0     0   9198      0 --:--:-- --:--:-- --:--:-- 27790
tar=/usr/bin/tar
version:
bsdtar 2.8.3 - libarchive 2.8.3
Installing without make. This may fail.
fetching: http://registry.npmjs.org/npm/-/npm-1.0.99.tgz
0.4.12
1.0.99
cleanup prefix=/usr/local

All clean!
npm ERR! Could not create /usr/local/lib/node_modules/___npm.npm
npm ERR! error installing npm@1.0.99 Error: EACCES, Permission denied '/usr/local/lib/node_modules/___npm.npm'
npm ERR! Error: EACCES, Permission denied '/usr/local/lib/node_modules/___npm.npm'
npm ERR! Report this *entire* log at:
npm ERR!     <http://github.com/isaacs/npm/issues>
npm ERR! or email it to:
npm ERR!     <npm-@googlegroups.com>
npm ERR! 
npm ERR! System Darwin 11.2.0
npm ERR! command "/usr/local/bin/node" "/private/var/folders/v5/l0ksk7v1021_cd9bcmcjzc880000gp/T/npm.14700/package/cli.js" "install" "-gf"
npm ERR! cwd /private/var/folders/v5/l0ksk7v1021_cd9bcmcjzc880000gp/T/npm.14700/package
npm ERR! node -v v0.4.12
npm ERR! npm -v 1.0.99
npm ERR! path /usr/local/lib/node_modules/___npm.npm
npm ERR! code EACCES
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /private/var/folders/v5/l0ksk7v1021_cd9bcmcjzc880000gp/T/npm.14700/package/npm-debug.log
npm not ok
It failed