diff --git a/pkgs/development/coq-modules/coqfmt/default.nix b/pkgs/development/coq-modules/coqfmt/default.nix
index aa099ffce34e..a98d6e8fa6bc 100644
--- a/pkgs/development/coq-modules/coqfmt/default.nix
+++ b/pkgs/development/coq-modules/coqfmt/default.nix
@@ -17,7 +17,7 @@ mkCoqDerivation rec {
 
   release."master" = {
     rev = "c26ce64d6ad1a1c3cafee38ab4889ad3b68a5c33";
-    sha256 = "sha256-4Q0z/KUHrJZKeKJDqa9mkxfy9LrGh2xPt561muUFYAY=";
+    hash = "sha256-4Q0z/KUHrJZKeKJDqa9mkxfy9LrGh2xPt561muUFYAY=";
   };
   namePrefix = [ ];