diff --git a/1a9bd729b97db408022995f93b19678706a79ca7.patch b/1a9bd729b97db408022995f93b19678706a79ca7.patch
new file mode 100644
index 0000000..6cb6983
--- /dev/null
+++ b/1a9bd729b97db408022995f93b19678706a79ca7.patch
@@ -0,0 +1,83 @@
+From 1a9bd729b97db408022995f93b19678706a79ca7 Mon Sep 17 00:00:00 2001
+From: Rudi Grinberg <me@rgrinberg.com>
+Date: Mon, 24 Aug 2020 02:39:59 -0700
+Subject: [PATCH] [configurator] more workaround for extracting #define
+
+allow duplicate values if they are the same _after_ conversion
+
+Signed-off-by: Rudi Grinberg <me@rgrinberg.com>
+---
+ otherlibs/configurator/src/v1.ml | 46 ++++++++++++++++++--------------
+ 1 file changed, 26 insertions(+), 20 deletions(-)
+
+diff --git a/otherlibs/configurator/src/v1.ml b/otherlibs/configurator/src/v1.ml
+index 721c0e7384..7e5dc19883 100644
+--- a/otherlibs/configurator/src/v1.ml
++++ b/otherlibs/configurator/src/v1.ml
+@@ -466,10 +466,6 @@ module C_define = struct
+       | Switch of bool
+       | Int of int
+       | String of string
+-
+-    let switch b = Switch b
+-
+-    let int i = Int i
+   end
+ 
+   let extract_program ?prelude includes vars =
+@@ -544,29 +540,39 @@ const char *s%i = "BEGIN-%i-false-END";
+                      Error [ v; v' ] )))
+     in
+     List.mapi vars ~f:(fun i (name, t) ->
+-        let raw_val =
++        let raw_vals =
+           match Int.Map.find values i with
++          | Some (Ok v) -> [ v ]
++          | Some (Error vs) -> vs
+           | None -> die "Unable to get value for %s" name
+-          | Some (Ok v) -> v
+-          | Some (Error vs) ->
+-            let vs = List.sort_uniq ~cmp:compare vs in
++        in
++        let parse_val_or_exn f =
++          let f x =
++            match f x with
++            | Some s -> s
++            | None ->
++              die
++                "Unable to read variable %S of type %s. Invalid value %S in %s \
++                 found"
++                name (Type.name t) x obj_file
++          in
++          let vs =
++            List.map ~f:(fun x -> (x, f x)) raw_vals
++            |> List.sort_uniq ~cmp:(fun (_, x) (_, y) -> compare x y)
++          in
++          match vs with
++          | [] -> assert false
++          | [ (_, v) ] -> v
++          | vs ->
++            let vs = List.map ~f:fst vs in
+             die "Duplicate values for %s:\n%s" name
+               (vs |> List.map ~f:(sprintf "- %s") |> String.concat ~sep:"\n")
+         in
+         let value =
+           match t with
+-          | Type.Switch -> Bool.of_string raw_val |> Option.map ~f:Value.switch
+-          | Int -> Int.of_string raw_val |> Option.map ~f:Value.int
+-          | String -> Some (String raw_val)
+-        in
+-        let value =
+-          match value with
+-          | Some v -> v
+-          | None ->
+-            die
+-              "Unable to read variable %S of type %s. Invalid value %S in %s \
+-               found"
+-              name (Type.name t) raw_val obj_file
++          | Type.Switch -> Value.Switch (parse_val_or_exn Bool.of_string)
++          | Int -> Value.Int (parse_val_or_exn Int.of_string)
++          | String -> String (parse_val_or_exn (fun x -> Some x))
+         in
+         (name, value))
+ 
diff --git a/ocaml-dune.spec b/ocaml-dune.spec
index a028aae..4514533 100644
--- a/ocaml-dune.spec
+++ b/ocaml-dune.spec
@@ -6,7 +6,7 @@
 
 Name:           ocaml-%{libname}
 Version:        2.7.0
-Release:        3%{?dist}
+Release:        5%{?dist}
 Summary:        A composable build system for OCaml
 
 # Dune itself is MIT.  Some bundled libraries have a different license:
@@ -25,6 +25,7 @@ Source0:        https://github.com/ocaml/%{libname}/archive/%{version}/%{libname
 # https://github.com/ocaml/dune/issues/3736
 # https://github.com/ocaml/dune/pull/3739
 Patch1:         3739.patch
+Patch2:         1a9bd729b97db408022995f93b19678706a79ca7.patch
 
 BuildRequires:  emacs
 BuildRequires:  ocaml >= 4.08
@@ -195,7 +196,7 @@ cp -ar README.md CHANGES.md MIGRATION.md doc/_build/* %{buildroot}%{_pkgdocdir}/
 %{_emacs_sitelispdir}/dune*
 
 %changelog
-* Mon Aug 24 2020 Richard W.M. Jones <rjones@redhat.com> - 2.7.0-3
+* Mon Aug 24 2020 Richard W.M. Jones <rjones@redhat.com> - 2.7.0-5
 - Add fix for https://github.com/ocaml/dune/issues/3736
 
 * Fri Aug 21 2020 Richard W.M. Jones <rjones@redhat.com> - 2.7.0-2