https module not found

[LewisJEllis]

{ Error: Cannot find module './https'
    at Function.Module._resolveFilename (module.js:536:15)
    at Function.Module._load (module.js:466:25)
    at Module.require (module.js:579:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/Users/lewis/dev/cirrus/node_modules/dd-trace/src/plugins/index.js:9:12)
    at Module._compile (module.js:635:30)
    at Object.Module._extensions..js (module.js:646:10)
    at Module.load (module.js:554:32)
    at tryModuleLoad (module.js:497:12)
    at Function.Module._load (module.js:489:3) code: 'MODULE_NOT_FOUND' }

It seems that src/plugins/index.js is attempting to require src/plugins/https.js which does not exist.