Lots of errors when trying to install locally on Ubuntu 17.10 about audiogram

[veltman]

Can you make sure you have all the canvas dependencies installed by running this first:

sudo apt-get install libcairo2-dev libjpeg8-dev libpango1.0-dev libgif-dev build-essential g++

After that, what happens if you run just npm install canvas?

[forteller]

Thank you for that fast reply, @veltman!

Running that apt command I get this:

build-essential is already the newest version (12.4ubuntu1).
g++ is already the newest version (4:7.2.0-1ubuntu1).
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:
 libcairo2-dev : Depends: libcairo2 (= 1.14.10-1ubuntu1) but 1.15.6-0intel1 is to be installed
                 Depends: libcairo-gobject2 (= 1.14.10-1ubuntu1) but 1.15.6-0intel1 is to be installed
E: Unable to correct problems, you have held broken packages.

I really don't understand that about held broken packages. I don't get a message like that when I apt update, upgrade or install anything else.

[veltman]

Hmm, hard to say exactly but it seems like some sort of dependency issue that hasn't graduated to the latest release. A few things you can try:

Ask the libcairo maintainers on Launchpad, link in sidebar here: https://packages.ubuntu.com/artful/libcairo2-dev

Try some of these package cleaning steps: https://askubuntu.com/questions/140246/how-do-i-resolve-unmet-dependencies-after-adding-a-ppa