diff --git a/jscomp/bsb/bsb_pkg.ml b/jscomp/bsb/bsb_pkg.ml
index b57d42a2a2..d5e7ae9c94 100644
--- a/jscomp/bsb/bsb_pkg.ml
+++ b/jscomp/bsb/bsb_pkg.ml
@@ -106,6 +106,24 @@ let pkg_name_as_variable package =
   |> fun s -> Ext_string.split s '-'
   |> String.concat "_"
 
+let rec find_dep_path ic package_name =
+  let line = input_line ic |> Ext_string.trim in
+  if Ext_string.starts_with line ("\"" ^ package_name ^ "@") then
+    input_line ic
+    |> Ext_string.trim
+    |> Ext_string.split_by (fun c -> c ='"')
+    |> List.hd
+  else
+    find_dep_path ic package_name
+
+let get_dep_path_from_file ~cwd package =
+  (* We should find the correct file if we move 3 steps up because we're in _esy/<sandbox>/store/b/<build> *)
+  try
+    let ic = open_in_bin Ext_path.(cwd // ".." // ".." // ".." // "installation.json") in
+    let package_name = Bsb_pkg_types.to_string package in
+    Some(find_dep_path ic package_name)
+  with _ -> None
+
 (** TODO: collect all warnings and print later *)
 let resolve_bs_package ~cwd (package : t) =
   if Lazy.force custom_resolution then
@@ -117,15 +135,18 @@ let resolve_bs_package ~cwd (package : t) =
     | exception Not_found ->
         begin
           Bsb_log.error
-            "@{<error>Custom resolution of package %s does not exist in var %s @}@."
+            "@{<error>Custom resolution@} of package @{<info>%s@} does not exist in var @{<info>%s@}, checking installation.json @."
             (Bsb_pkg_types.to_string package)
             custom_pkg_loc;
-          Bsb_exception.package_not_found ~pkg:package ~json:None
+
+          match get_dep_path_from_file ~cwd package with
+          | Some dep_path -> dep_path
+          | None -> Bsb_exception.package_not_found ~pkg:package ~json:None
         end
     | path when not (Sys.file_exists path) ->
         begin
           Bsb_log.error
-            "@{<error>Custom resolution of package %s does not exist on disk: %s=%s @}@."
+            "@{<error>Custom resolution@} of package @{<info>%s@} does not exist on disk: %s=%s @."
             (Bsb_pkg_types.to_string package)
             custom_pkg_loc
             path;
@@ -134,7 +155,7 @@ let resolve_bs_package ~cwd (package : t) =
     | path ->
       begin
         Bsb_log.info
-          "@{<info>Custom Resolution of package %s in var %s found at %s@}@."
+          "@{<info>Custom Resolution@} of package %s in var %s found at %s@."
           (Bsb_pkg_types.to_string package)
           custom_pkg_loc
           path;