./bin/hubot -a skype が動かない。

gistfile1.txt

[Tue Mar 05 2013 12:45:38 GMT+0900 (JST)] ERROR Cannot load adapter skype - Error: Cannot find module 'hubot'
TypeError: Cannot call method 'on' of null
    at Object.<anonymous> (/Users/ONDA/work/hubot/bin/hubot:136:19)
    at Object.<anonymous> (/Users/ONDA/work/hubot/bin/hubot:140:4)
    at Module._compile (module.js:449:26)
    at Object.exports.run (/Users/ONDA/.nodebrew/node/v0.8.18/lib/node_modules/coffee-script/lib/coffee-script/coffee-script.js:82:25)
    at compileScript (/Users/ONDA/.nodebrew/node/v0.8.18/lib/node_modules/coffee-script/lib/coffee-script/command.js:177:29)
    at fs.stat.notSources.(anonymous function) (/Users/ONDA/.nodebrew/node/v0.8.18/lib/node_modules/coffee-script/lib/coffee-script/command.js:152:18)
    at fs.readFile (fs.js:176:14)
    at Object.oncomplete (fs.js:297:15)

% node -v 
v0.8.18

% npm -v
1.2.2

% ./bin/hubot --version
2.4.7

% node -v
v0.9.11

でもダメでした。