I am trying to build gi-gtk-4.0.8 on Windows10 through stack. But the latest LTS version is only 3.0.41. which I am able to build. I see for example that for ArchLinux version 4.0.8 is available, looking at the hackage website. I have installed the 22.18 LTS version, along with the 3.0.41 gi-gtk package.