--- CMakeLists.txt.orig	2021-06-23 12:12:02 UTC
+++ CMakeLists.txt
@@ -106,18 +106,20 @@ if(WITH_DISCORD)
 endif()
 
 # GLM
-set(GLM_BASE_PATH "${EXTERNALS_DIR}")
+#set(GLM_BASE_PATH "${EXTERNALS_DIR}")
+#
+#if(NOT EXISTS "${GLM_BASE_PATH}/glm/CMakeLists.txt")
+#  set(GLM_ZIP "${DOWNLOADS_DIR}/glm.zip")
+#  file(DOWNLOAD "https://github.com/g-truc/glm/releases/download/0.9.9.8/glm-0.9.9.8.zip" "${GLM_ZIP}" TIMEOUT 60 TLS_VERIFY ON)
+#
+#  file(MAKE_DIRECTORY "${GLM_BASE_PATH}/glm")
+#  execute_process(COMMAND ${CMAKE_COMMAND} -E tar -xf "${GLM_ZIP}" WORKING_DIRECTORY "${GLM_BASE_PATH}")
+#endif()
+#
+#add_subdirectory("${GLM_BASE_PATH}/glm" "${PROJECT_BINARY_DIR}/glm" EXCLUDE_FROM_ALL)
 
-if(NOT EXISTS "${GLM_BASE_PATH}/glm/CMakeLists.txt")
-  set(GLM_ZIP "${DOWNLOADS_DIR}/glm.zip")
-  file(DOWNLOAD "https://github.com/g-truc/glm/releases/download/0.9.9.8/glm-0.9.9.8.zip" "${GLM_ZIP}" TIMEOUT 60 TLS_VERIFY ON)
+find_package(glm REQUIRED)
 
-  file(MAKE_DIRECTORY "${GLM_BASE_PATH}/glm")
-  execute_process(COMMAND ${CMAKE_COMMAND} -E tar -xf "${GLM_ZIP}" WORKING_DIRECTORY "${GLM_BASE_PATH}")
-endif()
-
-add_subdirectory("${GLM_BASE_PATH}/glm" "${PROJECT_BINARY_DIR}/glm" EXCLUDE_FROM_ALL)
-
 set(SOURCES
     src/main.cpp
     src/threatLevelEstimate.cpp
@@ -400,26 +402,26 @@ if(WITH_DISCORD)
     install(PROGRAMS "$<TARGET_PROPERTY:discord,IMPORTED_LOCATION>" DESTINATION "${discord_install_prefix}/plugins")
 endif()
 
-find_package(PythonInterp)
-if(PYTHONINTERP_FOUND)
-    set(SCRIPT_REFERENCE_HTML "${PROJECT_BINARY_DIR}/script_reference.html")
-    add_custom_command(
-        OUTPUT "${SCRIPT_REFERENCE_HTML}"
-        COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_SOURCE_DIR}/compile_script_docs.py "${SCRIPT_REFERENCE_HTML}"
-        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-        COMMENT "Building script reference documentation.")
-    add_custom_target(script_reference ALL DEPENDS "${SCRIPT_REFERENCE_HTML}")
-  
-  # Matches install logic above.
-  if(WIN32)
-    install(FILES "${SCRIPT_REFERENCE_HTML}" DESTINATION . OPTIONAL)
-  elseif(APPLE)
-    install(FILES "${SCRIPT_REFERENCE_HTML}" DESTINATION "$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Resources" OPTIONAL)
-  elseif(NOT ANDROID)
-    # DOCDIR already has PROJECT_NAME (EmptyEpsilon) appended (from CMake docs)
-    install(FILES "${SCRIPT_REFERENCE_HTML}" DESTINATION "${CMAKE_INSTALL_DOCDIR}" OPTIONAL)
-  endif()
-endif()
+#find_package(PythonInterp)
+#if(PYTHONINTERP_FOUND)
+#    set(SCRIPT_REFERENCE_HTML "${PROJECT_BINARY_DIR}/script_reference.html")
+#    add_custom_command(
+#        OUTPUT "${SCRIPT_REFERENCE_HTML}"
+#        COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_SOURCE_DIR}/compile_script_docs.py "${SCRIPT_REFERENCE_HTML}"
+#        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+#        COMMENT "Building script reference documentation.")
+#    add_custom_target(script_reference ALL DEPENDS "${SCRIPT_REFERENCE_HTML}")
+#  
+#  # Matches install logic above.
+#  if(WIN32)
+#    install(FILES "${SCRIPT_REFERENCE_HTML}" DESTINATION . OPTIONAL)
+#  elseif(APPLE)
+#    install(FILES "${SCRIPT_REFERENCE_HTML}" DESTINATION "$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_NAME}>/Resources" OPTIONAL)
+#  elseif(NOT ANDROID)
+#    # DOCDIR already has PROJECT_NAME (EmptyEpsilon) appended (from CMake docs)
+#    install(FILES "${SCRIPT_REFERENCE_HTML}" DESTINATION "${CMAKE_INSTALL_DOCDIR}" OPTIONAL)
+#  endif()
+#endif()
 
 add_custom_target(update_locale
     COMMAND xgettext --keyword=tr:1c,2 --keyword=tr:1 --keyword=trMark:1c,2 --keyword=trMark:1 --omit-header -d resources/locale/main.en ${SOURCES}