Heavily based on:
https://sources.debian.org/src/tinygltf/2.8.15%2Bdfsg-2/debian/patches/0001-Fix-build-system.patch/

Enables use of the ports 'nlohmann-json' and 'stb', instead of using the embedded versions.

--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -1,14 +1,18 @@
 cmake_minimum_required(VERSION 3.6)
 
-project(tinygltf)
+project(
+  TinyGLTF
+  VERSION ${TINYGLTF_VERSION}
+  LANGUAGES CXX)
 
 include(GNUInstallDirs)
 include(CMakePackageConfigHelpers)
 
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED On)
-set(CMAKE_CXX_EXTENSIONS Off)
-set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+find_package(nlohmann_json 3 REQUIRED)
+find_path(
+  stb_INCLUDE_DIRS
+  NAMES stb_image.h
+  PATH_SUFFIXES stb)
 
 option(TINYGLTF_BUILD_LOADER_EXAMPLE "Build loader_example(load glTF and dump infos)" ON)
 option(TINYGLTF_BUILD_GL_EXAMPLES "Build GL exampels(requires glfw, OpenGL, etc)" OFF)
@@ -36,44 +40,28 @@
   add_subdirectory ( examples/build-gltf )
 endif (TINYGLTF_BUILD_BUILDER_EXAMPLE)
 
-#
-# for add_subdirectory and standalone build
-#
-if (TINYGLTF_HEADER_ONLY)
-  add_library(tinygltf INTERFACE)
+add_library(${PROJECT_NAME} tiny_gltf.h tiny_gltf.cc)
+target_include_directories(
+  ${PROJECT_NAME}
+  PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+  PRIVATE ${stb_INCLUDE_DIRS})
+target_link_libraries(${PROJECT_NAME} PRIVATE nlohmann_json::nlohmann_json)
+set_target_properties(
+  ${PROJECT_NAME}
+  PROPERTIES OUTPUT_NAME "tinygltf"
+             VERSION ${PROJECT_VERSION})
+add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
 
-  target_include_directories(tinygltf
-          INTERFACE
-          $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-          $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
-  )
-
-else (TINYGLTF_HEADER_ONLY)
-  add_library(tinygltf)
-  target_sources(tinygltf PRIVATE
-          ${CMAKE_CURRENT_SOURCE_DIR}/tiny_gltf.cc)
-  target_include_directories(tinygltf
-          INTERFACE
-          $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-          $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
-          )
-endif (TINYGLTF_HEADER_ONLY)
-
-if (TINYGLTF_INSTALL)
-  install(TARGETS tinygltf EXPORT tinygltfTargets)
-  install(EXPORT tinygltfTargets NAMESPACE tinygltf:: FILE TinyGLTFTargets.cmake DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake)
-  configure_package_config_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/TinyGLTFConfig.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/TinyGLTFConfig.cmake INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake)
-  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/TinyGLTFConfig.cmake DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake)
-  # Do not install .lib even if !TINYGLTF_HEADER_ONLY
-
-  INSTALL ( FILES
-    json.hpp
-    stb_image.h
-    stb_image_write.h
-    tiny_gltf.h
-    ${TINYGLTF_EXTRA_SOUECES}
-    DESTINATION
-    include
-    )
-
-endif(TINYGLTF_INSTALL)
+install(
+  TARGETS ${PROJECT_NAME}
+  EXPORT ${PROJECT_NAME}Targets
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
+export(EXPORT ${PROJECT_NAME}Targets NAMESPACE ${PROJECT_NAME}::)
+install(
+  EXPORT ${PROJECT_NAME}Targets
+  NAMESPACE ${PROJECT_NAME}::
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME})
+install(FILES tiny_gltf.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})