Build failure

[nageshlop]

Node js with current version install is failed on amd64.
Build and test results can be found at below location,
https://travis-ci.org/github/nageshlop/hash-base/builds/747906869

Error log:
$ nvm install current
Version 'current' not found - try nvm ls-remote to browse available versions.
Failed to install current. Remote repository may not be reachable.
nvm install failed