diff --git a/src/dune_rules/dune_file.ml b/src/dune_rules/dune_file.ml
index 724033e7f14..52afd195d57 100644
--- a/src/dune_rules/dune_file.ml
+++ b/src/dune_rules/dune_file.ml
@@ -809,22 +809,18 @@ module Library = struct
       ~lib_config:
         ( { Lib_config.has_native; ext_lib; ext_dll; natdynlink_supported; _ }
         as lib_config ) =
-    let _loc, lib_name = conf.name in
     let obj_dir = obj_dir ~dir conf in
-    let gen_archive_file ~dir ext =
-      Path.Build.relative dir (Lib_name.Local.to_string lib_name ^ ext)
-    in
-    let archive_file = gen_archive_file ~dir in
+    let archive ?(dir = dir) ext = archive conf ~dir ~ext in
     let modes = Mode_conf.Set.eval ~has_native conf.modes in
-    let archive_file ~f_ext ~mode =
+    let archive_for_mode ~f_ext ~mode =
       if Mode.Dict.get modes mode then
-        Some (archive_file (f_ext mode))
+        Some (archive (f_ext mode))
       else
         None
     in
-    let archive_files ~f_ext =
+    let archives_for_mode ~f_ext =
       Mode.Dict.of_func (fun ~mode ->
-          archive_file ~f_ext ~mode |> Option.to_list)
+          archive_for_mode ~f_ext ~mode |> Option.to_list)
     in
     let jsoo_runtime =
       List.map conf.buildable.js_of_ocaml.javascript_files
@@ -839,8 +835,7 @@ module Library = struct
     let foreign_archives = foreign_lib_files conf ~dir ~ext_lib in
     let native_archives =
       if modes.native then
-        [ Path.Build.relative dir (Lib_name.Local.to_string lib_name ^ ext_lib)
-        ]
+        [ archive ext_lib ]
       else
         []
     in
@@ -850,7 +845,7 @@ module Library = struct
       (* XXX we shouldn't access the directory of the obj_dir directly. We
          should use something like [Obj_dir.Archive.obj] instead *)
       if modes.byte then
-        Some (gen_archive_file ~dir:(Obj_dir.obj_dir obj_dir) ".cma.js")
+        Some (archive ~dir:(Obj_dir.obj_dir obj_dir) ".cma.js")
       else
         None
     in
@@ -864,7 +859,7 @@ module Library = struct
       else
         let plugins =
           let archive_file ~mode =
-            archive_file ~f_ext:Mode.plugin_ext ~mode |> Option.to_list
+            archive_for_mode ~f_ext:Mode.plugin_ext ~mode |> Option.to_list
           in
           { Mode.Dict.native =
               ( if Dynlink_supported.get conf.dynlink natdynlink_supported then
@@ -874,7 +869,7 @@ module Library = struct
           ; byte = archive_file ~mode:Byte
           }
         in
-        (archive_files ~f_ext:Mode.compiled_lib_ext, plugins)
+        (archives_for_mode ~f_ext:Mode.compiled_lib_ext, plugins)
     in
     let main_module_name = main_module_name conf in
     let name = best_name conf in