Reading package lists... Done
Building dependency tree
Reading state information... Done
libgtk2.0-0 is already the newest version (2.24.32-4ubuntu4).
libgtk2.0-0 set to manually installed.
libxss1 is already the newest version (1:1.2.3-1).
libxss1 set to manually installed.
libxtst6 is already the newest version (2:1.2.3-1).
libxtst6 set to manually installed.
xauth is already the newest version (1:1.1-0ubuntu1).
xauth set to manually installed.
libnss3 is already the newest version (2:3.49.1-1ubuntu1.

.
libnss3 set to manually installed.
libasound2 is already the newest version (1.2.2-2.1ubuntu2.5).
libasound2 set to manually installed.
libgtk-3-0 is already the newest version (3.24.20-0ubuntu1.1).
libgtk-3-0 set to manually installed.
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:
libnotify-dev : Depends: libnotify4 (= 0.7.9-1ubuntu2) but 0.7.9-1ubuntu3.20.04.2 is to be installed
Depends: gir1.2-notify-0.7 (= 0.7.9-1ubuntu2) but 0.7.9-1ubuntu3.20.04.2 is to be installed
Depends: libglib2.0-dev (>= 2.26) but it is not going to be installed
Depends: libgdk-pixbuf2.0-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.