nanoboyadvance: use cmake flag instead of patch for glad source

pkgs/by-name/na/nanoboyadvance/dont-fetch-glad.patch

@@ -1,14 +0,0 @@
-diff --git a/src/platform/core/CMakeLists.txt b/src/platform/core/CMakeLists.txt
-index 2bc6d8c..3175c14 100644
---- a/src/platform/core/CMakeLists.txt
-+++ b/src/platform/core/CMakeLists.txt
-@@ -18,8 +18,7 @@ find_package(OpenGL REQUIRED)
- 
- include(FetchContent)
- FetchContent_Declare(glad
--  GIT_REPOSITORY https://github.com/Dav1dde/glad.git
--  GIT_TAG        adc3d7a1d704e099581ca25bc5bbdf728c2db67b # v2.0.5-2-gadc3d7a
-+  SOURCE_DIR @gladSrc@
-   SOURCE_SUBDIR  cmake
- )
- FetchContent_MakeAvailable(glad)

pkgs/by-name/na/nanoboyadvance/package.nix

@@ -2,7 +2,6 @@
   lib,
   stdenv,
   fetchFromGitHub,
-  substituteAll,
   cmake,
   python3Packages,
   libsForQt5,
@@ -12,6 +11,14 @@
   libunarr,
 }:
 
+let
+  gladSrc = fetchFromGitHub {
+    owner = "Dav1dde";
+    repo = "glad";
+    rev = "v2.0.5";
+    hash = "sha256-Ba7nbd0DxDHfNXXu9DLfnxTQTiJIQYSES9CP5Bfq4K0=";
+  };
+in
 stdenv.mkDerivation (finalAttrs: {
   pname = "nanoboyadvance";
   version = "1.8.1";
@@ -23,18 +30,6 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-du3dPTg3OxNTWXDQo2m9W0rJxtrkn+lQSh/XGiu/eGg=";
   };
 
-  patches = [
-    (substituteAll {
-      src = ./dont-fetch-glad.patch;
-      gladSrc = fetchFromGitHub {
-        owner = "Dav1dde";
-        repo = "glad";
-        rev = "v2.0.5";
-        hash = "sha256-Ba7nbd0DxDHfNXXu9DLfnxTQTiJIQYSES9CP5Bfq4K0=";
-      };
-    })
-  ];
-
   nativeBuildInputs = [
     cmake
     python3Packages.jinja2
@@ -50,6 +45,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   cmakeFlags = [
+    (lib.cmakeFeature "FETCHCONTENT_SOURCE_DIR_GLAD" "${gladSrc}")
     (lib.cmakeBool "USE_SYSTEM_FMT" true)
     (lib.cmakeBool "USE_SYSTEM_TOML11" true)
     (lib.cmakeBool "USE_SYSTEM_UNARR" true)