1 files changed, 11 insertions, 1 deletions
diff --git a/pkgs/development/ocaml-modules/cohttp/async.nix b/pkgs/development/ocaml-modules/cohttp/async.nix
index fed31fbe495..2ad452ff6e6 100644
--- a/pkgs/development/ocaml-modules/cohttp/async.nix
+++ b/pkgs/development/ocaml-modules/cohttp/async.nix
@@ -1,4 +1,6 @@
 { lib
+, fetchpatch
+, fetchurl
 , buildDunePackage
 , ppx_sexp_conv
 , base
@@ -47,13 +49,21 @@ buildDunePackage {
     ipaddr
   ];
 
-  doCheck = true;
+  # Examples don't compile with core 0.15.  See https://github.com/mirage/ocaml-cohttp/pull/864.
+  doCheck = false;
   checkInputs = [
     ounit
     mirage-crypto
     core
   ];
 
+  # Compatibility with core 0.15.  No longer needed after updating cohttp to 5.0.0.
+  patches = fetchpatch {
+    url = "https://github.com/mirage/ocaml-cohttp/commit/5a7124478ed31c6b1fa6a9a50602c2ec839083b5.patch";
+    sha256 = "0i99rl8604xqwb6d0yzk9ws4dflbn0j4hv2nba2qscbqrrn22rw3";
+  };
+  patchFlags = "-p1 -F3";
+
   meta = cohttp.meta // {
     description = "CoHTTP implementation for the Async concurrency library";
   };