(asdl_main c) -> _gen/frontend/types.asdl_c.h
  (frontend/consts_gen c) -> _gen/frontend/id_kind.asdl_c.h
  (lexer_gen) -> _build/tmp/frontend/match.re2c.txt
_build/tmp/frontend/match.re2c.txt -> (re2c) -> _gen/frontend/match.re2c.h
  (pyext/setup_fastlex.py) -> fastlex.so
OK _test/unit/pyext/fastlex_test.py.log