diff --git a/CMakeLists.txt b/CMakeLists.txt
index f2be1d7..7740dd5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -304,17 +304,30 @@ if (${WIN32})
     set (DXC "${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/bin/x64/dxc.exe")
     add_compile_definitions(NOMINMAX)
 else()
-    if(CMAKE_SIZEOF_VOID_P EQUAL 8 AND CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|AMD64")
-        if (APPLE)
-            set (DXC "DYLD_LIBRARY_PATH=${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/lib/x64" "${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/bin/x64/dxc")
-        else()
-            set (DXC "LD_LIBRARY_PATH=${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/lib/x64" "${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/bin/x64/dxc")
+    find_program(DXC dxc)
+    if (DXC)
+        execute_process(COMMAND ${DXC} --version OUTPUT_VARIABLE DXC_VERSION)
+        string(REGEX MATCH "([0-9]+)\\.([0-9]+)" DXC_VERSION "${DXC_VERSION}")
+
+        if (NOT DXC_VERSION VERSION_GREATER_EQUAL "1.8")
+            message(STATUS "DXC version is less than 1.8, using bundled DXC")
+            set(DXC "")
         endif()
-    else()
-        if (APPLE)
-            set (DXC "DYLD_LIBRARY_PATH=${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/lib/arm64" "${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/bin/arm64/dxc-macos")
+    endif()
+
+    if (NOT DXC)
+        if(CMAKE_SIZEOF_VOID_P EQUAL 8 AND CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|AMD64")
+            if (APPLE)
+                set (DXC "DYLD_LIBRARY_PATH=${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/lib/x64" "${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/bin/x64/dxc")
+            else()
+                set (DXC "LD_LIBRARY_PATH=${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/lib/x64" "${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/bin/x64/dxc")
+            endif()
         else()
-            set (DXC "LD_LIBRARY_PATH=${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/lib/arm64" "${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/bin/arm64/dxc-linux")
+            if (APPLE)
+                set (DXC "DYLD_LIBRARY_PATH=${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/lib/arm64" "${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/bin/arm64/dxc-macos")
+            else()
+                set (DXC "LD_LIBRARY_PATH=${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/lib/arm64" "${PROJECT_SOURCE_DIR}/lib/rt64/src/contrib/dxc/bin/arm64/dxc-linux")
+            endif()
         endif()
     endif()
 endif()
diff --git a/lib/rt64 b/lib/rt64
index e106c18..fcca86d 160000
--- a/lib/rt64
+++ b/lib/rt64
@@ -1 +1 @@
-Subproject commit e106c18965a89b26197bde972d9a83dd2dea1691
+Subproject commit fcca86d77afebb391e4a8e404cad46ba3ae883e3