I'm trying to install GDAL and GDAL development libraries on Ubuntu 20.04 with the following commands (source: https://mothergeo-py.readthedocs.io/en/latest/development/how-to/gdal-ubuntu-pkg.html):

sudo add-apt-repository ppa:ubuntugis/ppa

sudo apt-get update

sudo apt-get install gdal-bin

ogrinfo --version 

GDAL installs successfully and it returns:

GDAL 3.0.4, released 2020/01/28

After that, I tried installing GDAL development libraries:

sudo apt-get install libgdal-dev

It returns the following error:

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:

 libgdal-dev : Depends: libpq-dev but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

What is the problem here?
I read somewhere that "UbuntuGIS stable ppa (launchpad.net/~ubuntugis/+archive/ubuntu/ppa) does not have any 20.04 packages."
Is there a workaround for this? Everything works if I try it on Ubuntu 18.04.