How to install newer version Qt6 in Mint ?

[AndrzejB]

I have :

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Linuxmint
Description:	Linux Mint 21
Release:	21
Codename:	vanessa

I install Qt6 by:

sudo apt install libqt6*-dev

When I tried build KTExtEditor I have error:

CMake Error at CMakeLists.txt:58 (find_package):
  Could not find a configuration file for package "Qt6" that is compatible
  with requested version "6.4.0".

  The following configuration files were considered but not accepted:

    /usr/lib/x86_64-linux-gnu/cmake/Qt6/Qt6Config.cmake, version: 6.2.4
    /lib/x86_64-linux-gnu/cmake/Qt6/Qt6Config.cmake, version: 6.2.4

How to install version 6.4.0 or above ?

[ChrisW67]

@AndrzejB Assuming that open source use is OK, use the online installer from the Qt Company download site.

[JonB]

@ChrisW67 , @AndrzejB But don't come back to us if you find the download isn't working right now... ;-)