nvm can't ls or use

[ghost]

I installed nvm via the wget command from my user (not root/sudo)
wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.7.0/install.sh | sh

It was not automatically added to my zsh. I had to run source ~/.nvm/nvm.sh
Then I proceeded to install node 0.10.28
It node worked fine.
I rebooted.
Now after opening the terminal and running source ~/.nvm/nvm.sh
the nvm command produces the nvm menu.

But nvm ls or nvm use 0.10.28 produces this error:
mdm
mkdir: cannot create directory ‘/etc/mdm/alias’: Permission denied

if I open a sudo -s terminal then nvm ls shows 0.10.28 and use nvm 0.10
but running the use command from there is not the right way to do things.

What can I do?

why is NVM trying to write to /etc/mdm/alias. Seems very strange. It never did that before... :/
I guess I'll have to use an older version of nvm in the mean time

[ljharb]

I see you asked this same question in #node.js in freenode - I believe this is a duplicate of #394.

Somehow $NVM_DIR is set to the wrong value. See the last comment on #394 for a solution.