diff --git a/pkgs/development/tools/parsing/byacc/default.nix b/pkgs/development/tools/parsing/byacc/default.nix
index 6dbec5cfa9b4..7f9aacd8ce78 100644
--- a/pkgs/development/tools/parsing/byacc/default.nix
+++ b/pkgs/development/tools/parsing/byacc/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
       "ftp://ftp.invisible-island.net/byacc/${pname}-${version}.tgz"
       "https://invisible-mirror.net/archives/byacc/${pname}-${version}.tgz"
     ];
-    sha256 = "sha256-87Dt1YSkJtoO4WduTtdITmL3d8MeozrPTInWXjLHXOo=";
+    sha256 = "sha256-8VhSm+nQWUJjx/Eah2FqSeoj5VrGNpElKiME+7x9OoM=";
   };
 
   configureFlags = [