Comment # 11 on bug 1201474 from Michal Suchanek

From the available desktop options in the installer (GNOME, KDE, XFCE, minimal)
I picked XFCE, and then removed it completely because it was X11 based and
installed sway instead.

The searching for patterns is needlessly difficult. There is tab completion for
package names but I know no easy way how to discover patterns.

Yes, later I learned there is patterns-sway-sway, and it indeed does pull in
Mesa.

However, sway is user of GLES2, and to use GLES2 you need a GL driver, and none
is pulled in by installing the interface library.