在 ubuntu 22.04 上安装 qt5-defualt 时出现以下错误。
sudo apt-get install qt5-default
输出：
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package qt5-default is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'qt5-default' has no installation candidate