Signal Desktop is a chrome packaged app that links with your
Signal Android or Signal iOS app.

Signal is an encrypted instant messaging and voice calling
application for Android and iOS. It uses the Internet to
send one-to-one and group messages, which can include images
and video messages, and make one-to-one voice calls.

Please be sure to run the SlackBuild with a real root shell
using 'su -l'.  If the build fails with an access error, remove
the npm cache:

  rm -rf ~/.npm/