Problem installing dolfin-adjoint

[Paulo Yamabe]

Could not install dolfin-adjoint in a fresh installation of Ubuntu 16.04

The output of the terminal is the following

sudo apt-get install python-dolfin-adjoint
Reading package lists... Done
Building dependency tree       
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:
 python-dolfin-adjoint : Depends: python-libadjoint but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

I followed the instructions in the Download page, and added the dolfin-adjoint ppa

[uniederm]

I have the same issue. It seems to be a version conflict. libadjoint requires petsc 3.6 while python-dolfin needs petsc 3.7. Installing the one will always remove the other...