Failed to download tarball on aarch64 machine

[TETRA2000]

In Chromebook’s Linux Container with ARM processor like Chromebook Flip C101PA, uname -m shows “aarch64”. This makes a problem on downloading tarball.

$ ndenv install -v v8.12.0 
/tmp/node-build.20181104055822.3873 ~/ 
Downloading node-v8.12.0-linux-aarch64.tar.gz... 
-> https://nodejs.org/dist/v8.12.0/node-v8.12.0-linux-aarch64.tar.gz 
curl: (22) The requested URL returned error: 404 
tar (child): node-v8.12.0-linux-aarch64.tar.gz: Cannot open: No such file or directory 

I think this kind of workaround are needed.
https://github.com/nodenv/node-build/blob/df0e960eb027b3b3d4504af34f1faaef9f0e706e/bin/node-build#L173