Can't install heroku in OS X 10.11.3

[yukinakai]

After I installed heroku toolbelt on in browser, everytime I use the command "heroku" it shows this:

heroku-cli: Adding dependencies...
 ▸    Get https://cli-assets.heroku.com/node/v5.4.1/node-v5.4.1-darwin-x64.tar.gz: dial tcp: lookup cli-assets.heroku.com on [2404:1a8:7f01:b::3]:53: no such host
 done
heroku-cli: Installing core plugins...
 ▸    

 ▸    fork/exec bin/node: no such file or directory
heroku-cli: Installing core plugins (retrying)...
 ▸    Error installing package. 
 ▸    
 ▸    Try running again with GODE_DEBUG=info to see more output.
heroku-cli: Adding dependencies...
 ▸    Get https://cli-assets.heroku.com/node/v5.4.1/node-v5.4.1-darwin-x64.tar.gz: dial tcp: lookup cli-assets.heroku.com on [2404:1a8:7f01:b::3]:53: no such host
 done
heroku-cli: Installing core plugins...
 ▸    

 ▸    fork/exec bin/node: no such file or directory
heroku-cli: Installing core plugins (retrying)...
 ▸    Error installing package. 
 ▸    
 ▸    Try running again with GODE_DEBUG=info to see more output.
 !    error getting commands pid 8277 exit 1

What should I do?

[ransombriggs]

@yukinakai cli-assets.heroku.com does not have an IPV6 address, do you have a network configuration that ipv4 disabled or any other special IPV6 configuration? I am trying to figure out why it is not falling back to ipv4, when it cannot resolve an ipv6 address.

[yukinakai]

@ransombriggs Sorry for the delayed response, my problem was solved thanks to your answer. thanks a lot .