faisal@faisal-thinkpad-x220:~$ sudo add-apt-repository ppa:fossfreedom/budgie-desktop
[sudo] password for faisal:
 This PPA is now deprecated and will not receive further updates.

The budgie-remix team will now support budgie-desktop:

sudo add-apt-repository ppa:budgie-remix/ppa
sudo apt update
sudo apt install budgie-desktop ppa-purge
sudo ppa-purge ppa:fossfreedom/budgie-desktop
 More info: https://launchpad.net/~fossfreedom/+archive/ubuntu/budgie-desktop
Press [ENTER] to continue or ctrl-c to cancel adding it

gpg: keyring `/tmp/tmpscjcf1j0/secring.gpg' created
gpg: keyring `/tmp/tmpscjcf1j0/pubring.gpg' created
gpg: requesting key F4FE239D from hkp server keyserver.ubuntu.com
gpg: /tmp/tmpscjcf1j0/trustdb.gpg: trustdb created
gpg: key F4FE239D: public key "Launchpad PPA for fossfreedom" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)
OK
faisal@faisal-thinkpad-x220:~$ sudo apt-get update
Hit:1 http://ppa.launchpad.net/budgie-remix/ppa/ubuntu xenial InRelease
Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [94.5 kB]
Hit:3 http://ppa.launchpad.net/fossfreedom/budgie-desktop/ubuntu xenial InRelease
Hit:4 http://ppa.launchpad.net/gnome3-team/gnome3-staging/ubuntu xenial InRelease
Hit:5 http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu xenial InRelease
Hit:6 http://ppa.launchpad.net/numix/ppa/ubuntu xenial InRelease
Hit:7 http://kw.archive.ubuntu.com/ubuntu xenial InRelease
Hit:8 http://kw.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:9 http://kw.archive.ubuntu.com/ubuntu xenial-backports InRelease
Fetched 94.5 kB in 5s (16.2 kB/s)
Reading package lists... Done
faisal@faisal-thinkpad-x220:~$ sudo apt-get install budgie-desktop
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:
 budgie-desktop : Depends: budgie-core but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
faisal@faisal-thinkpad-x220:~$ sudo apt-get -f install budgie-desktop
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:
 budgie-desktop : Depends: budgie-core but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
faisal@faisal-thinkpad-x220:~$