官方的 GitHub 安装时，总是遇到这样那样的问题。

好像得先安装 qt。

apt install qtbase5-dev

又报错：

Current Qt Version: 5
Current Dtk Version: 
-- Found Doxygen: /usr/bin/doxygen (found version "1.8.17") found components: doxygen dot 
CMake Error at /usr/lib/x86_64-linux-gnu/cmake/Qt5/Qt5Config.cmake:28 (find_package):
  Could not find a package configuration file provided by "Qt5Help" with any
  of the following names:

    Qt5HelpConfig.cmake
-- Configuring incomplete, errors occurred!
    qt5help-config.cmake

  Add the installation prefix of "Qt5Help" to CMAKE_PREFIX_PATH or set
  "Qt5Help_DIR" to a directory containing one of the above files.  If
  "Qt5Help" provides a separate development package or SDK, be sure it has
  been installed.
Call Stack (most recent call first):
  docs/CMakeLists.txt:15 (find_package)