Run time error "cannot find module concat-map"

[msisco]

Just pulled the latest today and am getting this error when I try to run any zenbot command.
Node v8.1.0

Error: Cannot find module 'concat-map'
at Function.Module._resolveFilename (module.js:485:15)
at Function.Module._load (module.js:437:25)
at Module.require (module.js:513:17)
at require (internal/module.js:11:18)
at Object. (/home/ubuntu/zenbot/zenbot/node_modules/brace-expansion/index.js:1:79)
at Module._compile (module.js:569:30)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:503:32)
at tryModuleLoad (module.js:466:12)
at Function.Module._load (module.js:458:3)

[egorbenko]

remove package.lock and run npm install