Package: slack Version: 0.15.2-7 Slack (the popular proprietary collaboration app and service) ships a .deb that by default adds its own apt repository.[1] Unfortunately, they created a naming conflict (perhaps unknowingly). Since then, it looks like they've renamed their package to slack-desktop but kept the old slack package as a transitional package, apparently about 9 months ago.[2]
In this case, perhaps an epoch would be appropriate if you want users to be able to easily install both slack-desktop and your packaged slack, "the configuration management program". Thanks, Jeremy Bicha [1] deb https://packagecloud.io/slacktechnologies/slack/debian/ jessie main [2] https://packagecloud.io/slacktechnologies/slack?page=2 $ apt show slack Package: slack Version: 1.2.1 Priority: optional Section: misc Maintainer: Slack Technologies <feedb...@slack.com> Installed-Size: 25.6 kB Depends: slack-desktop Download-Size: 1,550 B APT-Sources: https://packagecloud.io/slacktechnologies/slack/debian jessie/main amd64 Packages Description: This package moves Slack beta users over to the released package name, 'slack-desktop' N: There are 11 additional records. Please use the '-a' switch to see them. $ apt show slack-desktop Package: slack-desktop Version: 2.0.6 Priority: optional Section: misc Maintainer: Slack Technologies <feedb...@slack.com> Installed-Size: 148 MB Depends: gconf2, gconf-service, libgtk2.0-0, libudev0 | libudev1, libgcrypt11 | libgcrypt20, libnotify4, libxtst6, libnss3, python, gvfs-bin, xdg-utils, apt-transport-https, libxss1 Suggests: libgnome-keyring0, gir1.2-gnomekeyring-1.0 Download-Size: 45.2 MB APT-Manual-Installed: yes APT-Sources: https://packagecloud.io/slacktechnologies/slack/debian jessie/main amd64 Packages Description: Slack Desktop N: There are 12 additional records. Please use the '-a' switch to see them.