--- GPTifier/CMakeLists.txt	2025-06-16 16:03:47.000000000 +0800
+++ GPTifier/CMakeLists.txt	2025-06-19 01:20:47.000000000 +0800
@@ -10,7 +10,6 @@
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_BUILD_TYPE RelWithDebInfo)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
-set(CMAKE_INSTALL_PREFIX "$ENV{HOME}/.local/bin")
 
 string(TIMESTAMP BUILD_DATE)
 
@@ -27,7 +26,6 @@
 endif()
 
 include_directories(
-  external
   src
   src/commands
   src/networking
@@ -78,15 +76,7 @@
 message(STATUS "Checking for nlohmann/json.hpp")
 
 if(USE_SYSTEM_NLOHMANN_JSON)
-  # i.e. specified by user as:
-  # `cmake -DUSE_SYSTEM_NLOHMANN_JSON=ON -DNLOHMANN_JSON_HPP=/path/to/json.hpp <args>`
-  set(NLOHMANN_JSON_HPP "" CACHE FILEPATH "Path to nlohmann/json.hpp")
-  if(EXISTS ${NLOHMANN_JSON_HPP})
-    message(STATUS "Copying ${NLOHMANN_JSON_HPP} -> ${CMAKE_SOURCE_DIR}/external")
-    file(COPY ${NLOHMANN_JSON_HPP} DESTINATION "${CMAKE_SOURCE_DIR}/external")
-  else()
-    message(FATAL_ERROR "The file '${NLOHMANN_JSON_HPP}' does not exist!")
-  endif()
+  # Assume cppflags are passed to CMake.
 else()
   set(NLOHMANN_JSON_HPP_DL "${CMAKE_SOURCE_DIR}/external/json.hpp")
   if(EXISTS ${NLOHMANN_JSON_HPP_DL})
@@ -106,15 +96,7 @@
 message(STATUS "Checking for toml++ header file")
 
 if(USE_SYSTEM_TOMLPLUSPLUS)
-  # i.e. specified by user as:
-  # `cmake -DUSE_SYSTEM_TOMLPLUSPLUS=ON -DTOMLPLUSPLUS_HPP=/path/to/toml.hpp <args>`
-  set(TOMLPLUSPLUS_HPP "" CACHE FILEPATH "Path to toml.hpp")
-  if(EXISTS ${TOMLPLUSPLUS_HPP})
-    message(STATUS "Copying ${TOMLPLUSPLUS_HPP} -> ${CMAKE_SOURCE_DIR}/external")
-    file(COPY ${TOMLPLUSPLUS_HPP} DESTINATION "${CMAKE_SOURCE_DIR}/external")
-  else()
-    message(FATAL_ERROR "The file '${TOMLPLUSPLUS_HPP}' does not exist!")
-  endif()
+  # Assume cppflags are passed to CMake.
 else()
   set(TOMLPLUSPLUS_HPP_DL "${CMAKE_SOURCE_DIR}/external/toml.hpp")
   if(EXISTS ${TOMLPLUSPLUS_HPP_DL})
@@ -133,4 +115,4 @@
 # -----------------------------------------------------------------------------------------------------------
 add_executable(gpt ${SRC_FILES})
 target_link_libraries(gpt curl pthread fmt::fmt)
-install(TARGETS gpt DESTINATION ${CMAKE_INSTALL_PREFIX})
+install(TARGETS gpt DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)