From 11c24ba9b3885c1f0c91ed3a8777664a4bc4f8b0 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Tue, 6 Jul 2021 21:50:53 +0200
Subject: [PATCH] ocamlPackages.mirage-flow-unix: fix tests with alcotest 1.4.0

---
 pkgs/development/ocaml-modules/mirage-flow/unix.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/development/ocaml-modules/mirage-flow/unix.nix b/pkgs/development/ocaml-modules/mirage-flow/unix.nix
index 3bd676b45fa0..0bd3e42ad37a 100644
--- a/pkgs/development/ocaml-modules/mirage-flow/unix.nix
+++ b/pkgs/development/ocaml-modules/mirage-flow/unix.nix
@@ -6,6 +6,11 @@ buildDunePackage {
 
   inherit (mirage-flow) version useDune2 src;
 
+  # Make tests compatible with alcotest 1.4.0
+  postPatch = ''
+    substituteInPlace test/test.ml --replace 'Fmt.kstrf Alcotest.fail' 'Fmt.kstrf (fun s -> Alcotest.fail s)'
+  '';
+
   propagatedBuildInputs = [ fmt logs mirage-flow ocaml_lwt cstruct ];
 
   doCheck = true;