diff --git a/src/file_tree.ml b/src/file_tree.ml
index 27c1079c..6bc5c021 100644
--- a/src/file_tree.ml
+++ b/src/file_tree.ml
@@ -24,15 +24,6 @@ type t =
 
 let root t = t.root
 
-let always_ignore =
-  String_set.of_list
-    [ ""
-    ; "_build"
-    ; ".git"
-    ; ".hg"
-    ; "_darcs"
-    ]
-
 let ignore_file = function
   | ""
   | "_build"
diff --git a/src/gen_rules.ml b/src/gen_rules.ml
index 76f2c7d5..62deffc5 100644
--- a/src/gen_rules.ml
+++ b/src/gen_rules.ml
@@ -785,7 +785,7 @@ module Gen(P : Params) = struct
                 ~modules
                 ~mode
                 (String_map.keys modules)))
-           (expand_and_eval_set ~dir lib.c_libraries ~standard:[])
+           (expand_and_eval_set ~dir lib.c_library_flags ~standard:[])
          >>>
          Build.run (Dep compiler)
            ~extra_targets:(
@@ -797,7 +797,7 @@ module Gen(P : Params) = struct
            ; As stubs_flags
            ; Dyn (fun (_, cclibs) ->
                S (List.map cclibs ~f:(fun flag ->
-                 Arg_spec.S [A "-cclib"; A ("-l" ^ flag)])))
+                 Arg_spec.S [A "-cclib"; A flag])))
            ; As (List.map lib.library_flags ~f:(expand_vars ~dir))
            ; As (match lib.kind with
                | Normal -> []
@@ -979,7 +979,7 @@ module Gen(P : Params) = struct
       | None ->
         let targets = [ stubs_archive lib ~dir; dll lib ~dir ] in
         add_rule
-          (expand_and_eval_set ~dir lib.c_libraries ~standard:[]
+          (expand_and_eval_set ~dir lib.c_library_flags ~standard:[]
            >>>
            Build.run
              ~extra_targets:targets
@@ -988,8 +988,7 @@ module Gen(P : Params) = struct
              ; A "-o"
              ; Path (Path.relative dir (sprintf "%s_stubs" lib.name))
              ; Deps o_files
-             ; Dyn (fun cclibs ->
-                 As (List.map cclibs ~f:((^) "-l")))
+             ; Dyn (fun cclibs -> As cclibs)
              ]);
     end;
 
diff --git a/src/jbuild_load.ml b/src/jbuild_load.ml
index c61e9b8d..ab933935 100644
--- a/src/jbuild_load.ml
+++ b/src/jbuild_load.ml
@@ -10,7 +10,7 @@ type conf =
 
 let load fn ~dir = (dir, Sexp_load.many fn Stanza.t)
 
-let load ftree =
+let load () =
   let rec walk dir stanzas =
     let path = File_tree.Dir.path dir in
     let files = File_tree.Dir.files dir in
diff --git a/src/jbuild_types.ml b/src/jbuild_types.ml
index 3519c7d9..e15f15bc 100644
--- a/src/jbuild_types.ml
+++ b/src/jbuild_types.ml
@@ -329,7 +329,7 @@ module Library = struct
     ; cxx_names                : string list
     ; includes                 : String_with_vars.t list
     ; library_flags            : String_with_vars.t list
-    ; c_libraries              : Ordered_set_lang.Unexpanded.t
+    ; c_library_flags          : Ordered_set_lang.Unexpanded.t
     ; preprocess               : Preprocess_map.t
     ; preprocessor_deps        : Dep_conf.t list
     ; self_build_stubs_archive : string option
@@ -358,7 +358,8 @@ module Library = struct
       ; field      "c_names"               (list string) ~default:[]
       ; field      "cxx_names"             (list string) ~default:[]
       ; field      "library_flags"         (list String_with_vars.t) ~default:[]
-      ; field_oslu "c_libraries"
+      ; field      "c_libraries"           (list string) ~default:[]
+      ; field_oslu "c_library_flags"
       ; field_pp   "preprocess"
       ; field      "preprocessor_deps"     (list Dep_conf.t) ~default:[]
       ; field      "self_build_stubs_archive" (option string) ~default:None
@@ -374,7 +375,8 @@ module Library = struct
       ; field_osl  "ocamlopt_flags"
       ]
       (fun name public_name synopsis public_headers libraries ppx_runtime_libraries
-        modules c_flags cxx_flags c_names cxx_names library_flags c_libraries preprocess
+        modules c_flags cxx_flags c_names cxx_names library_flags c_libraries
+        c_library_flags preprocess
         preprocessor_deps self_build_stubs_archive js_of_ocaml virtual_deps modes
         includes kind wrapped optional flags ocamlc_flags ocamlopt_flags ->
         { name
@@ -392,7 +394,11 @@ module Library = struct
         ; cxx_flags
         ; includes
         ; library_flags
-        ; c_libraries
+        ; c_library_flags =
+            Ordered_set_lang.Unexpanded.append
+              (Ordered_set_lang.Unexpanded.t
+                 (Sexp.To_sexp.(list string (List.map c_libraries ~f:((^) "-l")))))
+              c_library_flags
         ; preprocess
         ; preprocessor_deps
         ; self_build_stubs_archive
diff --git a/src/ordered_set_lang.ml b/src/ordered_set_lang.ml
index 7db68269..ef52986d 100644
--- a/src/ordered_set_lang.ml
+++ b/src/ordered_set_lang.ml
@@ -60,6 +60,8 @@ module Unexpanded = struct
   let t t = t
   let standard = standard
 
+  let append a b = Sexp.List [a; b]
+
   let files t =
     let rec loop acc : t -> _ = function
       | Atom _ -> acc
diff --git a/src/ordered_set_lang.mli b/src/ordered_set_lang.mli
index 8c8c67dd..66e09038 100644
--- a/src/ordered_set_lang.mli
+++ b/src/ordered_set_lang.mli
@@ -19,6 +19,8 @@ module Unexpanded : sig
   val t : Sexp.t -> t
   val standard : t
 
+  val append : t -> t -> t
+
   (** List of files needed to expand this set *)
   val files : t -> String_set.t