(compile -s -O3 -d1 simple-graphics.scm -j simple-graphics)
(compile -s -O3 -d1 simple-graphics.import.scm)
(compile -c -O3 -d1 simple-graphics.scm -unit simple-graphics)

(install-extension 'simple-graphics '("simple-graphics.so" "simple-graphics.o" "simple-graphics.import.so")
                   '((version "1.0")
                     (static "simple-graphics.o")))