Dependencies

You need to have installed:

Package name depends on your distro, however you should be aiming for -dev or -devel versions.

Listed below are some examples for the major distributions:

FreeBSD

# pkg install gtk4 gobject-introspection

# pkg_add gtk4 gobject-introspection

# dnf install gtk4-devel gtk-doc gobject-introspection-devel

# apt install libgtk-4-0 gobject-introspection gir1.2-gtk-4.0

# pacman -S gtk4 gobject-introspection