in repl
(ql:quickload :cffi)
in repl
(ql:quickload :cl-glfw3)
because cl-glfw3 use opengl for default, and not support vulkan, so you should add the follow things:
in glfw-bindings.lisp add :no-gl-api in enum opengl-api
(defcenum (opengl-api)
(:no-gl-api #X00000000)
(:opengl-api #X00030001)
(:opengl-es-api #X00030002))
in cl-glfw3.lisp you should change function create-window
(if (eq client-api :no-gl-api)
(setf *window* window)
(make-context-current window)))))
in repl
(push #P"you-vkel-path" asdf:*central-registry*)
(ql:quickload :vkel)
(ql:quickload :vkel-demo)