Build against system libraries instead of vcpkg and bundled submodules, and do not override
the user's -march.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9032d76..4410cd3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,5 @@
 cmake_minimum_required (VERSION 3.20)
 
-if(NOT DEFINED ENV{VCPKG_ROOT})
-    message(FATAL_ERROR "VCPKG_ROOT is not defined!")
-endif()
-
-include($ENV{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake)
 set(UNLEASHED_RECOMP_THIRDPARTY_ROOT ${CMAKE_SOURCE_DIR}/thirdparty)
 set(UNLEASHED_RECOMP_TOOLS_ROOT ${CMAKE_SOURCE_DIR}/tools)
 set(CMAKE_CXX_STANDARD 20)
@@ -18,16 +13,11 @@ endif()
 
 set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
 
-# Target Sandy Bridge for all projects
-add_compile_options(
-    -march=sandybridge
-)
+project("UnleashedRecomp-ALL")
 
 add_subdirectory(${UNLEASHED_RECOMP_THIRDPARTY_ROOT})
 add_subdirectory(${UNLEASHED_RECOMP_TOOLS_ROOT})
 
-project("UnleashedRecomp-ALL")
-
 # Include sub-projects.
 add_subdirectory("UnleashedRecompLib")
 add_subdirectory("UnleashedRecomp")
diff --git a/UnleashedRecomp/CMakeLists.txt b/UnleashedRecomp/CMakeLists.txt
index 10863c0..aca5e1f 100644
--- a/UnleashedRecomp/CMakeLists.txt
+++ b/UnleashedRecomp/CMakeLists.txt
@@ -209,13 +209,8 @@ set(UNLEASHED_RECOMP_THIRDPARTY_INCLUDES
     "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/ddspp"
     "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/imgui"
     "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/implot"
-    "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/json/include"
-    "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/magic_enum/include"
-    "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/stb"
-    "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/unordered_dense/include"
+    /usr/include/stb
     "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/volk"
-    "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/Vulkan-Headers/include"
-    "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/VulkanMemoryAllocator/include"
     "${UNLEASHED_RECOMP_TOOLS_ROOT}/bc_diff"
     "${UNLEASHED_RECOMP_TOOLS_ROOT}/XenosRecomp/thirdparty/smol-v/source"
 )
@@ -324,7 +319,6 @@ if (CMAKE_SYSTEM_NAME MATCHES "Linux")
     target_compile_definitions(UnleashedRecomp PRIVATE SDL_VULKAN_ENABLED)
 endif()
 
-find_package(directx-dxc REQUIRED)
 find_package(CURL REQUIRED)
 
 if (UNLEASHED_RECOMP_D3D12)
@@ -348,8 +342,6 @@ if (UNLEASHED_RECOMP_D3D12)
     )
 endif()
 
-file(CHMOD ${DIRECTX_DXC_TOOL} PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE)
-
 if (WIN32)
     target_link_libraries(UnleashedRecomp PRIVATE
         comctl32
diff --git a/thirdparty/CMakeLists.txt b/thirdparty/CMakeLists.txt
index 97656fd..5b74ffb 100644
--- a/thirdparty/CMakeLists.txt
+++ b/thirdparty/CMakeLists.txt
@@ -1,5 +1,39 @@
 cmake_policy(SET CMP0077 NEW)
 
+set(CMAKE_FIND_PACKAGE_TARGETS_GLOBAL ON)
+find_package(PkgConfig REQUIRED)
+
+find_package(fmt REQUIRED)
+find_package(tomlplusplus REQUIRED)
+find_package(nfd REQUIRED)
+find_package(SDL2 REQUIRED)
+find_package(SDL2_mixer REQUIRED)
+
+pkg_check_modules(XXHASH REQUIRED IMPORTED_TARGET GLOBAL libxxhash)
+add_library(xxHash::xxhash ALIAS PkgConfig::XXHASH)
+pkg_check_modules(ZSTD REQUIRED IMPORTED_TARGET GLOBAL libzstd)
+add_library(libzstd INTERFACE)
+target_link_libraries(libzstd INTERFACE PkgConfig::ZSTD)
+add_library(libzstd_static ALIAS libzstd)
+
+add_library(SDL2::SDL2-static ALIAS SDL2::SDL2)
+if(NOT TARGET SDL2_mixer)
+    add_library(SDL2_mixer INTERFACE)
+    target_link_libraries(SDL2_mixer INTERFACE SDL2_mixer::SDL2_mixer)
+endif()
+
+find_program(DIRECTX_DXC_TOOL dxc HINTS /usr/lib/llvm/dxc/bin REQUIRED)
+find_library(DIRECTX_DXCOMPILER_LIBRARY dxcompiler HINTS /usr/lib/llvm/dxc/lib REQUIRED)
+find_path(DIRECTX_DXC_INCLUDE_DIR dxcapi.h HINTS /usr/lib/llvm/dxc/include PATH_SUFFIXES dxc REQUIRED)
+add_library(Microsoft::DirectXShaderCompiler UNKNOWN IMPORTED GLOBAL)
+set_target_properties(Microsoft::DirectXShaderCompiler PROPERTIES
+    IMPORTED_LOCATION "${DIRECTX_DXCOMPILER_LIBRARY}"
+    INTERFACE_INCLUDE_DIRECTORIES "${DIRECTX_DXC_INCLUDE_DIR}")
+# DXIL signing is only used for the Windows Direct3D 12 shader cache.
+add_library(Microsoft::DXIL INTERFACE IMPORTED GLOBAL)
+
+set(MSDF_ATLAS_USE_VCPKG OFF)
+set(MSDFGEN_USE_VCPKG OFF)
 set(MSDF_ATLAS_BUILD_STANDALONE OFF)
 set(MSDF_ATLAS_USE_SKIA OFF)
 set(MSDF_ATLAS_NO_ARTERY_FONT ON)
@@ -16,7 +50,5 @@ set(SDL2MIXER_VORBIS "VORBISFILE")
 set(SDL2MIXER_WAVPACK OFF)
 
 add_subdirectory("${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/msdf-atlas-gen")
-add_subdirectory("${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/nativefiledialog-extended")
 add_subdirectory("${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/o1heap")
-add_subdirectory("${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/SDL")
-add_subdirectory("${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/SDL_mixer")
+
diff --git a/tools/XenosRecomp/CMakeLists.txt b/tools/XenosRecomp/CMakeLists.txt
index b6e3369..ad9a1db 100644
--- a/tools/XenosRecomp/CMakeLists.txt
+++ b/tools/XenosRecomp/CMakeLists.txt
@@ -1,6 +1,5 @@
 cmake_minimum_required(VERSION 3.20)
 
-include($ENV{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake)
 set(CMAKE_CXX_STANDARD 17)
 
 project("XenosRecomp-ALL")
diff --git a/tools/XenosRecomp/XenosRecomp/CMakeLists.txt b/tools/XenosRecomp/XenosRecomp/CMakeLists.txt
index 4e0e2d2..aed1782 100644
--- a/tools/XenosRecomp/XenosRecomp/CMakeLists.txt
+++ b/tools/XenosRecomp/XenosRecomp/CMakeLists.txt
@@ -18,8 +18,6 @@ add_executable(XenosRecomp
     shader_recompiler.h
     "${SMOLV_SOURCE_DIR}/smolv.cpp")
 
-find_package(directx-dxc CONFIG REQUIRED)
-
 target_link_libraries(XenosRecomp PRIVATE
     Microsoft::DirectXShaderCompiler
     Microsoft::DXIL