tce-load -i compiletc meson libarchive-dev vala-dev gtk-vnc-dev gtksourceview4-dev libosinfo-dev libsecret-dev libvirt-glib-dev spice-gtk-dev tracker3-dev webkitgtk4-dev libhandy1-dev gobject-introspection-dev intltool itstool desktop-file-utils appstream-glib

wget https://download.gnome.org/sources/gnome-boxes/40/gnome-boxes-40.0.tar.xz

cd gnome-boxes-40.0

edit build-aux/post_install.py
/usr/bin/env python3

mkdir build
cd build

CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" meson --prefix=/usr/local --localstatedir=/var --libexecdir=/usr/local/lib/gnome-boxes --buildtype=plain

ninja [0m 38.46s]
sudo ninja install

$ sudo modprobe kvm-intel
$ sudo libvirtd -d
$ gnome-boxes --checks

(gnome-boxes:15230): Boxes-WARNING **: 16:03:07.545: util-app.vala:346: Failed to execute child process ?restorecon? (No such file or directory)
βΆ The CPU is capable of virtualization: yes
βΆ The KVM module is loaded: yes
βΆ Libvirt KVM guest available: yes
βΆ Boxes storage pool available: yes
βΆ The SELinux context is default: no