diff --git a/CMakeLists.txt b/CMakeLists.txt
index 56457f5..8e71597 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,5 +13,12 @@ set(CMAKE_VERBOSE_MAKEFILE ON CACHE BOOL "ON")
 # external/imgui/backends/imgui_impl_sdlrenderer.cpp .
 find_package(SDL2 2.0.17)
 
+find_file(DOOM1_WAD doom1.wad HINTS /usr/share/games/doom)
+if (DOOM1_WAD)
+    file(CREATE_LINK ${DOOM1_WAD} doom1.wad COPY_ON_ERROR SYMBOLIC)
+else()
+    message(WARNING "-- Could not find 'doom1.wad' required to start dooms. Missing 'doom-wad-shareware' package?")
+endif()
+
 add_subdirectory(external)
 add_subdirectory(src)