(compile -sJ -O0 -d2 combinator-birds-chicken.scm -o combinator-birds.so)
(compile -s  -O0 -d2 combinator-birds.import.scm)
(compile -s  -O0 -d2 combinator-letters.import.scm)
(install-extension 'combinator-birds
  '("combinator-birds.so"
    "combinator-birds.import.so"
    "combinator-letters.import.so")
  '((version 0.0.3)))