dnf：如何判斷導致依賴關係中斷的原因？

有時在執行 a 時，dnf upgrade我會被告知由於依賴關係損壞，它正在跳過包。它會告訴我哪些包被跳過，但不告訴我為什麼它們被跳過。我如何找出“為什麼”？

使用相當不明顯的--best選項。從手冊頁：

  -b, --best
         Try the best available package versions in transactions. Specif‐
         ically during dnf upgrade, which by default skips  over  updates
         that  can  not  be  installed for dependency reasons, the switch
         forces DNF to only consider the latest  packages.  When  running
         into  packages  with broken dependencies, DNF will fail giving a
         reason why the latest version can not be installed.

引用自：https://unix.stackexchange.com/questions/341333