Jitsi-meet source code construction error

according to readme on https://github.com/jitsi/jitsi-meet,
i try to building the sources on ubuntu 16.04
first :
i type this command line:
[sudo apt-get install npm nodejs
cd jitsi-meet
npm install]
when i type [sudo npm install] it’s too long time to wait and no response
so i
replace ‘npm’ with’cnpm’ [this is a’npm’command that uses other register mirrors address]
and second :
i type [make]
Display error

[Makefile:18: recipe for target ‘compile’ failed
make: *** [compile] Error 2]

i found some error msg
[Module not found: Error: Can’t resolve 'babel-runtime/******]
i think i lost babel-runtime
so i install babel/runtime and babel-loader again
but also disaple this error msg
how can i do?
thx
from a newbee