I don't think this is exactly the same as https://bugs.launchpad.net/ubuntu/+source/gnome-control- center/+bug/1762256 because when I try installing the tree of dependencies I get slightly different errors...
$ sudo apt install colord 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. colord : Depends: libsane1 (>= 1.0.24) but it is not going to be installed E: Unable to correct problems, you have held broken packages. $ sudo apt install libsane1 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. libsane1 : Depends: libsane-common (= 1.0.27-1~experimental3ubuntu2) but 1.0.27+git20180317-xenial0 is to be installed Recommends: sane-utils (>= 1.0.27-1~experimental3ubuntu2) E: Unable to correct problems, you have held broken packages. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1821809 Title: gnome-control-center won't install: Depends: colord (>= 0.1.30) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1821809/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs