diff --git a/pkgs/development/coq-modules/CertiRocq/default.nix b/pkgs/development/coq-modules/CertiRocq/default.nix
index cb7f5accee56..cf012f592dfb 100644
--- a/pkgs/development/coq-modules/CertiRocq/default.nix
+++ b/pkgs/development/coq-modules/CertiRocq/default.nix
@@ -41,7 +41,7 @@ mkCoqDerivation {
       ]
       null;
   release = {
-    "0.9.1+9.1".sha256 = "sha256-YsweBaoq8+QG63e7Llp/4bHldAFnSQSyMumJkb+Bsp0=";
+    "0.9.1+9.1".hash = "sha256-YsweBaoq8+QG63e7Llp/4bHldAFnSQSyMumJkb+Bsp0=";
   };
   releaseRev = v: "v${v}";