@Tim, well, when I run the command "apt-cache policy libgtk-3-dev" I get this output:
libgtk-3-dev: Installed: 3.18.5-1ubuntu2~wily1 Candidate: 3.18.5-1ubuntu2~wily1 Version table: *** 3.18.5-1ubuntu2~wily1 0 500 http://ppa.launchpad.net/gnome3-team/gnome3-staging/ubuntu/ wily/main amd64 Packages 100 /var/lib/dpkg/status 3.16.7-0ubuntu3 0 500 http://archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
@Tim, well, when I run the command "apt-cache policy libgtk-3-dev" I get this output:
libgtk-3-dev: 1ubuntu2~ wily1 1ubuntu2~ wily1 1ubuntu2~ wily1 0 ppa.launchpad. net/gnome3- team/gnome3- staging/ ubuntu/ wily/main amd64 Packages dpkg/status
3.16. 7-0ubuntu3 0 archive. ubuntu. com/ubuntu/ wily/main amd64 Packages
Installed: 3.18.5-
Candidate: 3.18.5-
Version table:
*** 3.18.5-
500 http://
100 /var/lib/
500 http://