Installation got stuck on Pi 3B

[bitevader]

Trying several approaches to install babelpod. Succeeded until inclusive running airtunes.git, but failed with npm install.
My ultimate wish is to link my physical analog audio sources to wireless SONOS speakers. You are the only one I've discovered in the whole of internet to build this path - reason enough to love you.
So excuse me for bothering you with the 2 files appended describing the path I followed and so far failed it at the very end.
UpTo_airtunes.txt
Airtunes Build Error.txt

bitevader

[bitevader]

This was the cause of the failure. Can anybody help me out here? Im not proficient enough with linux environment.

pi@raspberrypi:~ $ sudo apt-get install npm
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libnode72 : Conflicts: nodejs-legacy
 nodejs : Conflicts: npm
E: Unable to correct problems, you have held broken packages.
pi@raspberrypi:~ $