diff --git a/pkgs/development/libraries/flatbuffers/23.nix b/pkgs/development/libraries/flatbuffers/23.nix
new file mode 100644
index 000000000000..5263694b0562
--- /dev/null
+++ b/pkgs/development/libraries/flatbuffers/23.nix
@@ -0,0 +1,47 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+  python3,
+}:
+
+stdenv.mkDerivation rec {
+  pname = "flatbuffers";
+  version = "23.5.26";
+
+  src = fetchFromGitHub {
+    owner = "google";
+    repo = "flatbuffers";
+    rev = "v${version}";
+    hash = "sha256-e+dNPNbCHYDXUS/W+hMqf/37fhVgEGzId6rhP3cToTE=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    python3
+  ];
+
+  cmakeFlags = [
+    "-DFLATBUFFERS_BUILD_TESTS=${if doCheck then "ON" else "OFF"}"
+    "-DFLATBUFFERS_OSX_BUILD_UNIVERSAL=OFF"
+  ];
+
+  doCheck = stdenv.hostPlatform == stdenv.buildPlatform;
+  checkTarget = "test";
+
+  meta = with lib; {
+    description = "Memory Efficient Serialization Library";
+    longDescription = ''
+      FlatBuffers is an efficient cross platform serialization library for
+      games and other memory constrained apps. It allows you to directly
+      access serialized data without unpacking/parsing it first, while still
+      having great forwards/backwards compatibility.
+    '';
+    homepage = "https://google.github.io/flatbuffers/";
+    license = licenses.asl20;
+    maintainers = [ maintainers.teh ];
+    mainProgram = "flatc";
+    platforms = platforms.unix;
+  };
+}
diff --git a/pkgs/development/libraries/onnxruntime/default.nix b/pkgs/development/libraries/onnxruntime/default.nix
index 6297488d491a..4eef69d925ee 100644
--- a/pkgs/development/libraries/onnxruntime/default.nix
+++ b/pkgs/development/libraries/onnxruntime/default.nix
@@ -2,13 +2,12 @@
 , stdenv
 , lib
 , fetchFromGitHub
-, fetchpatch
 , Foundation
 , abseil-cpp
 , cmake
 , cpuinfo
 , eigen
-, flatbuffers
+, flatbuffers_23
 , gbenchmark
 , glibcLocales
 , gtest
@@ -184,7 +183,7 @@ effectiveStdenv.mkDerivation rec {
     "-DFETCHCONTENT_QUIET=OFF"
     "-DFETCHCONTENT_SOURCE_DIR_ABSEIL_CPP=${abseil-cpp.src}"
     "-DFETCHCONTENT_SOURCE_DIR_DATE=${howard-hinnant-date}"
-    "-DFETCHCONTENT_SOURCE_DIR_FLATBUFFERS=${flatbuffers.src}"
+    "-DFETCHCONTENT_SOURCE_DIR_FLATBUFFERS=${flatbuffers_23.src}"
     "-DFETCHCONTENT_SOURCE_DIR_GOOGLETEST=${gtest.src}"
     "-DFETCHCONTENT_SOURCE_DIR_GOOGLE_NSYNC=${nsync.src}"
     "-DFETCHCONTENT_SOURCE_DIR_MP11=${mp11}"
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3462d27600c0..772530b9b5d5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -23563,6 +23563,7 @@ with pkgs;
   protozero = callPackage ../development/libraries/protozero { };
 
   flatbuffers = callPackage ../development/libraries/flatbuffers { };
+  flatbuffers_23 = callPackage ../development/libraries/flatbuffers/23.nix { };
 
   nanopbMalloc = callPackage ../by-name/na/nanopb/package.nix { enableMalloc = true; };