Installing emi generator error

[gregbriandavis]

Not sure what's going on here. Here's the error from terminal:

/usr/local/lib/node_modules/generator-emi/app/index.js:9
var EmiGenerator = yeoman.generators.Base.extend({
^

TypeError: Cannot read property 'Base' of undefined
at Object. (/usr/local/lib/node_modules/generator-emi/app/index.js:9:37)
at Module._compile (module.js:556:32)
at Object.Module._extensions..js (module.js:565:10)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)
at Module.require (module.js:483:17)
at require (internal/module.js:20:19)
at Object.get [as emi:app] (/usr/local/lib/node_modules/yo/node_modules/yeoman-environment/lib/store.js:38:27)
at Store.get (/usr/local/lib/node_modules/yo/node_modules/yeoman-environment/lib/store.js:61:39)