meritous: reenable stack protection and apply the proposed patch

Instead of applying `sed` locally let's apply the patch pending upstream
inclusion.

pkgs/by-name/me/meritous/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitLab,
+  fetchpatch,
   SDL,
   SDL_image,
   SDL_mixer,
@@ -19,13 +20,20 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-6KK2anjX+fPsYf4HSOHQ0EQBINqZiVbxo1RmBR6pslg=";
   };
 
+  patches = [
+    # Fix stack overflow on too long files:
+    #   https://gitlab.com/meritous/meritous/-/merge_requests/5
+    (fetchpatch {
+      name = "fix-overflow.patch";
+      url = "https://gitlab.com/meritous/meritous/-/commit/68029f02ccaea86fb96d6dd01edb269ac3e6eff0.patch";
+      hash = "sha256-YRV0cEcn6nEJUdHF/cheezNbsgZmjy0rSUw0tuhUYf0=";
+    })
+  ];
+
   prePatch = ''
     substituteInPlace Makefile \
       --replace "prefix=/usr/local" "prefix=$out" \
       --replace sdl-config ${lib.getDev SDL}/bin/sdl-config
-
-    substituteInPlace src/audio.c \
-      --replace "filename[64]" "filename[256]"
   '';
 
   buildInputs = [
@@ -36,15 +44,14 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   installPhase = ''
+    runHook preInstall
+
     install -m 555 -D meritous $out/bin/meritous
     mkdir -p $out/share/meritous
     cp -r dat/* $out/share/meritous/
-  '';
 
-  hardeningDisable = [
-    "stackprotector"
-    "fortify"
-  ];
+    runHook postInstall
+  '';
 
   meta = with lib; {
     description = "Action-adventure dungeon crawl game";