diff --git a/pkgs/development/coq-modules/VplTactic/default.nix b/pkgs/development/coq-modules/VplTactic/default.nix
index dbd930b6c183..0e2e0b225bdf 100644
--- a/pkgs/development/coq-modules/VplTactic/default.nix
+++ b/pkgs/development/coq-modules/VplTactic/default.nix
@@ -12,7 +12,7 @@ mkCoqDerivation {
   defaultVersion = if lib.versions.isEq "8.9" coq.version then "0.5" else null;
 
   release."0.5".rev = "487e3aff8446bed2c5116cefc7d71d98a06e85de";
-  release."0.5".sha256 = "sha256-4h0hyvj9R+GOgnGWQFDi0oENLZPiJoimyK1q327qvIY=";
+  release."0.5".hash = "sha256-4h0hyvj9R+GOgnGWQFDi0oENLZPiJoimyK1q327qvIY=";
 
   buildInputs = [ coq.ocamlPackages.vpl-core ];
   propagatedBuildInputs = [ Vpl ];