diff --git a/pkgs/development/coq-modules/rewriter/default.nix b/pkgs/development/coq-modules/rewriter/default.nix
index 3e3e05cd516e..d1822e1cd4bf 100644
--- a/pkgs/development/coq-modules/rewriter/default.nix
+++ b/pkgs/development/coq-modules/rewriter/default.nix
@@ -21,7 +21,7 @@ mkCoqDerivation {
       }
     ] null;
   release = {
-    "0.0.15".sha256 = "sha256-zxNIMppFXUKShOXLbdZphy0Je5ii6cjcWUUcQMTcaHk=";
+    "0.0.15".hash = "sha256-zxNIMppFXUKShOXLbdZphy0Je5ii6cjcWUUcQMTcaHk=";
   };
   releaseRev = v: "v${v}";