Same issue here: when attempting to upgrade Cinnamon 3, the dependency libmuffin is unsatisfied (see output below). Please advise on fixes. -Hadi # apt-get -t jessie-backports install cinnamon cinnamon-common [...] The following packages have unmet dependencies: cinnamon : Depends: gir1.2-meta-muffin-0.0 (>= 2.8) but 2.2.6-4 is to be installed Depends: libmuffin0 (>= 2.6.0) but 2.2.6-4 is to be installed cinnamon-common : Depends: gir1.2-meta-muffin-0.0 (>= 3.0) but 2.2.6-4 is to be installed # apt-cache policy libmuffin0 [..] Version table: *** 2.2.6-4 0 500 http://ftp.debian.org/debian/ jessie/main amd64 Packages 100 /var/lib/dpkg/status
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