diff --git a/pkgs/by-name/ht/html-tidy/package.nix b/pkgs/by-name/ht/html-tidy/package.nix
index c75bfdbb1f7e..fa5c7f20a965 100644
--- a/pkgs/by-name/ht/html-tidy/package.nix
+++ b/pkgs/by-name/ht/html-tidy/package.nix
@@ -26,6 +26,11 @@ stdenv.mkDerivation rec {
       sha256 = "sha256-Q2GjinNBWLL+HXUtslzDJ7CJSTflckbjweiSMCnIVwg=";
     }
   );
+  # https://github.com/htacg/tidy-html5/issues/1139
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace-fail 'cmake_minimum_required (VERSION 2.8.12)' 'cmake_minimum_required(VERSION 3.5)'
+  '';
 
   nativeBuildInputs = [
     cmake