diff --git a/pkgs/by-name/li/libultrahdr/gtest.patch b/pkgs/by-name/li/libultrahdr/gtest.patch
new file mode 100644
index 000000000000..50f70c38a5b5
--- /dev/null
+++ b/pkgs/by-name/li/libultrahdr/gtest.patch
@@ -0,0 +1,39 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 5128335..bacf495 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -536,16 +536,6 @@ if(UHDR_BUILD_TESTS)
+     set(GTEST_LIB_PREFIX ${GTEST_BINARY_DIR}/lib/)
+   endif()
+   set(GTEST_BOTH_LIBRARIES ${GTEST_LIB_PREFIX}${GTEST_LIB} ${GTEST_LIB_PREFIX}${GTEST_LIB_MAIN})
+-  ExternalProject_Add(${GTEST_TARGET_NAME}
+-      GIT_REPOSITORY https://github.com/google/googletest
+-      GIT_TAG v1.14.0
+-      PREFIX ${GTEST_PREFIX_DIR}
+-      SOURCE_DIR ${GTEST_SOURCE_DIR}
+-      BINARY_DIR ${GTEST_BINARY_DIR}
+-      CMAKE_ARGS ${UHDR_CMAKE_ARGS}
+-      BUILD_BYPRODUCTS ${GTEST_BOTH_LIBRARIES}
+-      INSTALL_COMMAND ""
+-  )
+ endif()
+ 
+ if(UHDR_BUILD_BENCHMARK)
+@@ -675,16 +665,15 @@ endif()
+ 
+ if(UHDR_BUILD_TESTS)
+   add_executable(ultrahdr_unit_test ${UHDR_TEST_SRCS_LIST})
+-  add_dependencies(ultrahdr_unit_test ${GTEST_TARGET_NAME} ${UHDR_CORE_LIB_NAME})
+   target_compile_options(ultrahdr_unit_test PRIVATE ${UHDR_WERROR_FLAGS})
+   target_include_directories(ultrahdr_unit_test PRIVATE
+     ${PRIVATE_INCLUDE_DIR}
+-    ${GTEST_INCLUDE_DIRS}
++    @GTEST_INCLUDE_DIRS@
+   )
+   if(UHDR_BUILD_FUZZERS)
+     target_link_options(ultrahdr_unit_test PRIVATE -fsanitize=fuzzer-no-link)
+   endif()
+-  target_link_libraries(ultrahdr_unit_test ${UHDR_CORE_LIB_NAME} ${GTEST_BOTH_LIBRARIES})
++  target_link_libraries(ultrahdr_unit_test ${UHDR_CORE_LIB_NAME} -lgtest -lgtest_main)
+   add_test(NAME UHDRUnitTests, COMMAND ultrahdr_unit_test)
+ endif()
diff --git a/pkgs/by-name/li/libultrahdr/package.nix b/pkgs/by-name/li/libultrahdr/package.nix
new file mode 100644
index 000000000000..4bf5fa1563a9
--- /dev/null
+++ b/pkgs/by-name/li/libultrahdr/package.nix
@@ -0,0 +1,97 @@
+{
+  stdenv,
+  lib,
+  fetchFromGitHub,
+  replaceVars,
+  cmake,
+  ninja,
+  pkg-config,
+  libjpeg,
+  gtest,
+  ctestCheckHook,
+  versionCheckHook,
+  testers,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  version = "1.4.0";
+  pname = "libultrahdr";
+
+  src = fetchFromGitHub {
+    owner = "google";
+    repo = "libultrahdr";
+    rev = "v${finalAttrs.version}";
+    hash = "sha256-SLhHiwuyHzVx/Kv+eBy8LzHTnShKXlJoszxZNPATbhs=";
+  };
+
+  outputs = [
+    "out"
+    "dev"
+  ];
+
+  patches = [
+    (replaceVars ./gtest.patch {
+      GTEST_INCLUDE_DIRS = "${lib.getDev gtest}/include";
+    })
+  ];
+
+  # CMake incorrect absolute include/lib paths: https://github.com/NixOS/nixpkgs/issues/144170
+  postPatch = ''
+    substituteInPlace cmake/libuhdr.pc.in \
+      --replace-fail \
+        'libdir=''${prefix}/@CMAKE_INSTALL_LIBDIR@' \
+        'libdir=@CMAKE_INSTALL_FULL_LIBDIR@' \
+      --replace-fail \
+        'includedir=''${prefix}/@CMAKE_INSTALL_INCLUDEDIR@' \
+        'includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@'
+  '';
+
+  cmakeFlags = [
+    (lib.cmakeBool "UHDR_BUILD_TESTS" true)
+  ];
+
+  nativeBuildInputs = [
+    cmake
+    ninja
+    pkg-config
+    libjpeg
+    gtest
+  ];
+
+  nativeCheckInputs = [
+    ctestCheckHook
+  ];
+
+  doCheck = true;
+
+  nativeInstallCheckInputs = [
+    versionCheckHook
+  ];
+
+  doInstallCheck = true;
+
+  passthru.tests = {
+    pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
+  };
+
+  meta = {
+    description = "Reference codec for the Ultra HDR format";
+    longDescription = ''
+      Ultra HDR is a true HDR image format, and is backcompatible. libultrahdr
+      is the reference codec for the Ultra HDR format. The codecs that support
+      the format can render the HDR intent of the image on HDR displays; other
+      codecs can still decode and display the SDR intent of the image.
+    '';
+    homepage = "https://developer.android.com/media/platform/hdr-image-format";
+    changelog = "https://github.com/google/libultrahdr/releases/tag/v${finalAttrs.version}";
+    pkgConfigModules = [ "libuhdr" ];
+    maintainers = with lib.maintainers; [
+      yzx9
+    ];
+    platforms = lib.platforms.all;
+    license = with lib.licenses; [
+      asl20
+    ];
+    mainProgram = "ultrahdr_app";
+  };
+})
diff --git a/pkgs/by-name/op/openimageio/package.nix b/pkgs/by-name/op/openimageio/package.nix
index ce8842e2bcb1..f8ff843e92bb 100644
--- a/pkgs/by-name/op/openimageio/package.nix
+++ b/pkgs/by-name/op/openimageio/package.nix
@@ -11,6 +11,7 @@
   libwebp,
   libjxl,
   libheif,
+  libultrahdr,
   opencolorio,
   openexr,
   openjph,
@@ -53,6 +54,7 @@ stdenv.mkDerivation (finalAttrs: {
     libpng
     libtiff
     libwebp
+    libultrahdr
     opencolorio
     openexr
     openjph