diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -291,6 +291,16 @@
 	endif()
 endif()
 
+# std::filesystem support for older compilers
+if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.1)
+        link_libraries(c++fs)
+	endif()
+elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
+        link_libraries(stdc++fs)
+	endif()
+endif()
 
 # Make sure that all the global compiler and linker flags are set BEFORE
 # including the libraries so they apply as needed.