diff --git a/pkgs/development/ocaml-modules/graphql/cohttp.nix b/pkgs/development/ocaml-modules/graphql/cohttp.nix
index c60745b23cd3..cd326bdde201 100644
--- a/pkgs/development/ocaml-modules/graphql/cohttp.nix
+++ b/pkgs/development/ocaml-modules/graphql/cohttp.nix
@@ -12,7 +12,7 @@
   graphql-lwt,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "graphql-cohttp";
 
   inherit (graphql) version src;
@@ -28,7 +28,7 @@ buildDunePackage rec {
     ocplib-endian
   ];
 
-  checkInputs = lib.optionals doCheck [
+  checkInputs = lib.optionals finalAttrs.doCheck [
     alcotest
     cohttp-lwt-unix
     graphql-lwt
@@ -45,4 +45,4 @@ buildDunePackage rec {
     description = "Run GraphQL servers with “cohttp”";
   };
 
-}
+})