`copy_files` was added in `jbuilder.1.0+beta14`
Marek Kubica 3 years ago c36e8ca5 7f900d8d
··· 14 14 depends: [ 15 15 "ocaml" 16 16 "camlp4" 17 17 - "jbuilder" {>= "1.0+beta7"} 17 17 + "jbuilder" {>= "1.0+beta14"} 18 18 "lwt" 19 19 ] 20 20 build: [