NPM issues

Tom-Longsons-MacBook-Pro:Locker tomlong$ curl http://npmjs.org/install.sh | sh
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  3927  100  3927    0     0  11563      0 --:--:-- --:--:-- --:--:-- 24543
Installing without make. This may fail.
fetching: http://registry.npmjs.org/npm/-/npm-1.0.23.tgz
0.4.8
1.0.23
cleanup prefix=/usr/local

This script will find and eliminate any shims, symbolic
links, and other cruft that was installed by npm 0.x.

Is this OK? enter 'yes' or 'no' 
yes

All clean!
npm ERR! Error: EACCES, Permission denied '/usr/local/bin/npm'
npm ERR! 
npm ERR! Please use 'sudo' or log in as root to run this command.
npm ERR! 
npm ERR!     sudo npm "rm" "npm" "-gf"
npm ERR! 
npm ERR! or set the 'unsafe-perm' config var to true.
npm ERR! 
npm ERR!     npm config set unsafe-perm true
npm ERR! 
npm ERR! System Darwin 11.0.0
npm ERR! command "/usr/local/bin/node" "/private/var/folders/nz/sgcvb26537gbpdyzxt576jqw0000gn/T/npm.18060/package/cli.js" "rm" "npm" "-gf"
npm ERR! cwd /private/var/folders/nz/sgcvb26537gbpdyzxt576jqw0000gn/T/npm.18060/package
npm ERR! node -v v0.4.8
npm ERR! npm -v 1.0.23
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /private/var/folders/nz/sgcvb26537gbpdyzxt576jqw0000gn/T/npm.18060/package/npm-debug.log
npm not ok
npm ERR! error installing [email protected] Error: EACCES, Permission denied '/usr/local/bin/npm'
npm ERR! error rolling back [email protected] Error: EACCES, Permission denied '/usr/local/bin/npm'
npm ERR! Error: EACCES, Permission denied '/usr/local/bin/npm'
npm ERR! 
npm ERR! Please use 'sudo' or log in as root to run this command.
npm ERR! 
npm ERR!     sudo npm "install" "-gf"
npm ERR! 
npm ERR! or set the 'unsafe-perm' config var to true.
npm ERR! 
npm ERR!     npm config set unsafe-perm true
npm ERR! 
npm ERR! System Darwin 11.0.0
npm ERR! command "/usr/local/bin/node" "/private/var/folders/nz/sgcvb26537gbpdyzxt576jqw0000gn/T/npm.18060/package/cli.js" "install" "-gf"
npm ERR! cwd /private/var/folders/nz/sgcvb26537gbpdyzxt576jqw0000gn/T/npm.18060/package
npm ERR! node -v v0.4.8
npm ERR! npm -v 1.0.23
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /private/var/folders/nz/sgcvb26537gbpdyzxt576jqw0000gn/T/npm.18060/package/npm-debug.log
npm not ok
It failed
Tom-Longsons-MacBook-Pro:Locker tomlong$ sudo npm "install" "-gf"
npm ERR! TypeError: Cannot call method 'filter' of undefined
npm ERR!     at /usr/local/lib/node_modules/npm/lib/utils/load-package-defaults.js:64:15
npm ERR!     at cb (/usr/local/lib/node_modules/npm/lib/utils/async-map.js:51:11)
npm ERR!     at /usr/local/lib/node_modules/npm/lib/utils/find.js:23:20
npm ERR!     at cb (/usr/local/lib/node_modules/npm/lib/utils/graceful-fs.js:31:9)
npm ERR! Report this *entire* log at:
npm ERR!     <http://github.com/isaacs/npm/issues>
npm ERR! or email it to:
npm ERR!     <[email protected]>
npm ERR! 
npm ERR! System Darwin 11.0.0
npm ERR! command "node" "/usr/local/bin/npm" "install" "-gf"
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /Users/tomlong/ltest/lockerbox/Locker/npm-debug.log
npm not ok
Tom-Longsons-MacBook-Pro:Locker tomlong$