In node.js 0.6.x the require.paths has been removed.
$ qw -r node express
Error: require.paths is removed. Use node_modules folders, or the NODE_PATH environment variable instead.
at Function.Object.defineProperty.get (module.js:388:11)
at Object.<anonymous> (/home/m/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/qwandry-0.1.5/lib/qwandry/configuration/probe_node.js:4:17)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:901:3
No packages matched 'express'
$ node --version
v0.10.21