sails is not defined about barrels HOT 5 CLOSED

/Users/guten/a/sails/hello/node_modules/barrels/index.js:131
    var Model = sails.models[modelName];
                ^

ReferenceError: sails is not defined
    at /Users/guten/a/sails/hello/node_modules/barrels/index.js:131:17
    at /Users/guten/a/sails/hello/node_modules/barrels/node_modules/async/lib/async.js:181:20
    at Object.async.forEachOf.async.eachOf (/Users/guten/a/sails/hello/node_modules/barrels/node_modules/async/lib/async.js:233:13)
    at Object.async.forEach.async.each (/Users/guten/a/sails/hello/node_modules/barrels/node_modules/async/lib/async.js:209:22)
    at Barrels.populate (/Users/guten/a/sails/hello/node_modules/barrels/index.js:130:51)
    at Object.<anonymous> (/Users/guten/a/sails/hello/fixtures.js:9:17)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)
    at Module.load (module.js:458:32)
    at tryModuleLoad (module.js:417:12)

var sails = require("sails")
var rc = require("rc")
var Barrels = require("barrels")

sails.lift(rc("sails"), err => {
  new Barrels().populate(err => {
    console.log(err)
  })
})