Comment 132 for bug 2059847

@sldayo Can you help? This is what I get:

$ sudo apt install gir1.2-mutter-10/jammy-proposed libmutter-10-0/jammy-proposed
[sudo] password for donn:
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package gir1.2-mutter-10 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Package libmutter-10-0 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Release 'jammy-proposed' for 'gir1.2-mutter-10' was not found
E: Release 'jammy-proposed' for 'libmutter-10-0' was not found

Anyone got instructions for dummies for me ? :D