1 files changed, 5 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/ocaml-modules/mirage-channel/default.nix b/nixpkgs/pkgs/development/ocaml-modules/mirage-channel/default.nix
index 5b639e6fdd6e..227e821e1924 100644
--- a/nixpkgs/pkgs/development/ocaml-modules/mirage-channel/default.nix
+++ b/nixpkgs/pkgs/development/ocaml-modules/mirage-channel/default.nix
@@ -14,6 +14,11 @@ buildDunePackage rec {
     sha256 = "0wmb2zhiyp8n78xgcspcsyd19bhcml3kyli2caw3778wc1gyvfpc";
   };
 
+  # Make tests compatible with alcotest 1.4.0
+  postPatch = ''
+    substituteInPlace test/test_channel.ml --replace 'Fmt.kstrf Alcotest.fail' 'Fmt.kstrf (fun s -> Alcotest.fail s)'
+  '';
+
   propagatedBuildInputs = [ cstruct logs lwt mirage-flow ];
 
   doCheck = true;