diff --git a/infer/src/jbuild.in b/infer/src/jbuild.in
index 2191ef2d9..da53a67bb 100644
--- a/infer/src/jbuild.in
+++ b/infer/src/jbuild.in
@@ -3,46 +3,24 @@
 
 let ( ^/ ) = Filename.concat
 
-(* Compute the list of all the source files.
-
-   This is needed until jbuilder supports finding sources in subdirectories somehow
-   (https://github.com/janestreet/jbuilder/issues/34). *)
-
-let sources =
-  let src_dirs =
-    ( if facebook then
-        (* do not use the symlinks in src/facebook/: jbuilder will not detect that the files have changed if they are hidden behind a symlink *)
-        "../../facebook/skel/infer/src/facebook"
-    else "opensource" )
-    :: ( ( if clang then ["clang"; ("unit" ^/ "clang")]
-         else ["clang_stubs"; ("unit" ^/ "clang_stubs")] )
-       @ [ (if java then "java" else "java_stubs")
-         ; (if python && facebook then "python" else "python_stubs")
-         ; "absint"
-         ; "backend"
-         ; "base"
-         ; "bufferoverrun"
-         ; "checkers"
-         ; "eradicate"
-         ; "harness"
-         ; "integration"
-         ; "IR"
-         ; "labs"
-         ; "quandary"
-         ; "unit" ] )
-  in
-  let files = ref [] in
-  let ml_suffixes = [".ml"; ".mli"; ".mll"; ".mly"] in
-  let add_file dir file =
-    if List.exists (Filename.check_suffix file) ml_suffixes then files := (dir ^/ file) :: !files
-  in
-  let one_dir dir =
-    (* absolute path so that running jbuilder from any subdirectory (in particular from src/Makefile)
-       points at the right original files in ocamlc's error messages *)
-    let abs_dir = Sys.getcwd () ^/ dir in
-    Array.iter (add_file abs_dir) (Sys.readdir dir)
-  in
-  List.iter one_dir src_dirs ; !files
+let source_dirs =
+  (if facebook then "facebook" else "opensource")
+  :: ( ( if clang then ["clang"; ("unit" ^/ "clang")]
+       else ["clang_stubs"; ("unit" ^/ "clang_stubs")] )
+     @ [ (if java then "java" else "java_stubs")
+       ; (if python && facebook then "python" else "python_stubs")
+       ; "absint"
+       ; "backend"
+       ; "base"
+       ; "bufferoverrun"
+       ; "checkers"
+       ; "eradicate"
+       ; "harness"
+       ; "integration"
+       ; "IR"
+       ; "labs"
+       ; "quandary"
+       ; "unit" ] )
 
 let infer_binaries =
   ["infer"; "inferunit"] @ if facebook then ["InferCreateTraceViewLinks"] else []
@@ -52,16 +30,6 @@ let infer_cflags =
 
 let infer_libraries = "InferStdlib" :: "InferGenerated" :: common_libraries
 
-(** Return the best copy action for a given [source] file. That is, when possibly, use "copy#" so
-    that jump-to-defition and compiler errors go to the right original source file, otherwise do a
-    normal copy. *)
-let copy_action_of_source source =
-  if Filename.check_suffix source ".mly" then
-    (* menhir doesn't support '# 1 "<source file>"' directives at the start of the file inserted by
-       copy# actions *)
-    "copy"
-  else "copy#"
-
 (** The build stanzas to be passed to jbuilder *)
 let stanzas =
   ( if clang then
@@ -107,10 +75,13 @@ let stanzas =
 |}
         (String.concat " " infer_cflags) (String.concat " " common_optflags)
         (String.concat " " infer_binaries) ]
-  @ List.map
-      (fun source ->
-        Printf.sprintf "(rule (%s %s %s))" (copy_action_of_source source) source
-          (Filename.basename source))
-      sources
+  @ ( List.map
+        (fun source_dir ->
+          [ Printf.sprintf "(copy_files# %s/*.ml{,i,l})" source_dir
+          ; (* menhir doesn't support '# 1 "<source file>"' directives at the start of the file inserted by
+       copy# actions *)
+          Printf.sprintf "(copy_files %s/*.mly)" source_dir ])
+        source_dirs
+    |> List.concat )
 
 ;; String.concat "\n" stanzas |> Jbuild_plugin.V1.send
diff --git a/opam b/opam
index 98ba69aaf..1f80452f2 100644
--- a/opam
+++ b/opam
@@ -34,7 +34,7 @@ depends: [
   "ctypes" {>="0.9.2"}
   "extlib-compat"
   "javalib" {>="2.3.3"}
-  "jbuilder" {build & >="1.0+beta11"}
+  "jbuilder" {build & >="1.0+beta14"}
   "mtime"
   "ocamlfind" {build}
   "ounit" {="2.0.0"}
diff --git a/opam.lock b/opam.lock
index 6c5ed8387..2f6fbaedd 100644
--- a/opam.lock
+++ b/opam.lock
@@ -24,7 +24,7 @@ fieldslib = v0.9.0
 integers = 0.2.2
 jane-street-headers = v0.9.0
 javalib = 2.3.3
-jbuilder = 1.0+beta13
+jbuilder = 1.0+beta14
 menhir = 20170712
 mtime = 1.1.0
 num = 0