choosenim install fails!
use command  "curl https://nim-lang.org/choosenim/init.sh -sSf | sh" to install choosenim on a  DO VPS (CentOS 7.0 64X)
Failed with following messages:

![image](https://user-images.githubusercontent.com/7478640/43240179-c9d2691c-90c7-11e8-9197-39b609e1b67e.png)
![image](https://user-images.githubusercontent.com/7478640/43240200-e8d9ebaa-90c7-11e8-969f-3f6fd8e92dc5.png)

tried several times always the same result, very frustrating.
Please Help

Thank you

Feng