Luarocks fails installing 'async' & 'trepl' [Error: Connection timed out] - lua

Question

Hello fellow programmers,
I'm new to the Lua world. I'm working with this application and I constantly end up receiving the following error while trying to run the code following their README:
/usr/bin/luajit: /usr/share/lua/5.1/trepl/init.lua:383: module 'display' not found:No LuaRocks module found for display
no field package.preload['display']
no file '/tmp/buildd/.luarocks/share/lua/5.1/display.lua'
no file '/tmp/buildd/.luarocks/share/lua/5.1/display/init.lua'
no file '/usr/share/lua/5.1/display.lua'
no file '/usr/share/lua/5.1/display/init.lua'
no file './display.lua'
no file '/usr/share/luajit-2.1.0-beta1/display.lua'
no file '/usr/local/share/lua/5.1/display.lua'
no file '/usr/local/share/lua/5.1/display/init.lua'
no file '/gpfs01/bethge/home/hmoriceau/.luarocks/share/lua/5.1/display.lua'
no file '/gpfs01/bethge/home/hmoriceau/.luarocks/share/lua/5.1/display/init.lua'
no file '/tmp/buildd/.luarocks/lib/lua/5.1/display.so'
no file '/usr/lib/lua/5.1/display.so'
no file './display.so'
no file '/usr/local/lib/lua/5.1/display.so'
no file '/usr/local/lib/lua/5.1/loadall.so'
no file '/gpfs01/bethge/home/hmoriceau/.luarocks/lib/lua/5.1/display.so'
stack traceback:
[C]: in function 'error'
/usr/share/lua/5.1/trepl/init.lua:383: in function 'require'
stylization_train.lua:9: in main chunk
[C]: in function 'dofile'
/usr/lib/luarocks/rocks/trepl/scm-1/bin/th:145: in main chunk
[C]: at 0x00406670
Naturally I tried to run a sudo luarocks install display but get the following error:
Installing https://raw.githubusercontent.com/torch/rocks/master/display-scm-0.rockspec...
Using https://raw.githubusercontent.com/torch/rocks/master/display-scm-0.rockspec... switching to 'build' mode
Missing dependencies for display:
async >= 1.0
luasocket >= 2.0
Using https://raw.githubusercontent.com/torch/rocks/master/async-scm-1.rockspec... switching to 'build' mode
Cloning into 'async'...
fatal: unable to connect to github.com:
github.com[0: 192.30.253.113]: errno=Connection timed out
Error: Failed installing dependency: https://raw.githubusercontent.com/torch/rocks/master/async-scm-1.rockspec - Failed cloning git repository.
Some people have had similar errors but I think the source of this one is different. I also think that it is unlikely that the mirror for this module is down.
Lua version: 5.2.3
Installed using sudo apt-get install lua5.2 after having updated&&upgraded everything.
Your help is appreciated!
Best,
Hichame

Answer 1

For anyone else who had this issue, I managed to solve it using: git config --global url.https://github.com/.insteadOf git://github.com/
For documentation, you might also be interested in knowing that you can manually install lua modules using:
git clone <module-repo>
cd <module-repo-directory>
sudo luarocks make