My version of node is always v0.6.1-pre even after I install brew node and NVM install v0.6.19.
My node version is:
First of all, you need to deactivate node: (mac) after install new node version.
nvm deactivate
This is removed /Users/user_name/.nvm/*/bin from $PATH
And after that node was updated
node --version v10.9.0