Cannot install puppet because of unmet dependencies
I'm trying to install puppet on a fresh ubuntu 14.04 machine but I get the following error
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: puppet : Depends: puppet-common (= 3.7.0-1puppetlabs1) but it is not going to be installed E: Unable to correct problems, you have held broken packages.
I've followed the instructions here and did the following
wget https://apt.puppetlabs.com/puppetlabs-release-trusty.deb sudo dpkg -i puppetlabs-release-trusty.deb sudo apt-get update
I've also tried installing ruby and uncommenting the 'devel' sources in puppetlabs.list.
Any help would really be appreciated.