--- CMakeLists.txt.orig	2022-09-16 09:12:03 UTC
+++ CMakeLists.txt
@@ -41,14 +41,8 @@ add_subdirectory(src/singleapplication)
 
 find_package(Qt5 COMPONENTS Widgets LinguistTools DBus REQUIRED)
 
-find_package(ECM REQUIRED NO_MODULE)
-list(APPEND CMAKE_MODULE_PATH ${ECM_MODULE_PATH})
-
 include(CPack)
 include(GNUInstallDirs)
-include(ECMInstallIcons)
-include(ECMConfiguredInstall)
-include(KDEInstallDirs)
 
 find_package(PolkitQt5-1 REQUIRED)
 
@@ -129,7 +123,10 @@ install(TARGETS ${PROJECT_NAME} DESTINATION ${CMAKE_IN
 install(FILES ${QM_FILES} DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/translations)
 install(FILES data/${DESKTOP_FILE} DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/applications)
 
-ecm_install_icons(ICONS ${APP_ICONS} DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/icons)
+foreach(ICON IN LISTS APP_ICONS)
+    string(REGEX MATCH "[0-9]+" SIZE ${ICON})
+    install(FILES ${ICON} DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/icons/hicolor/${SIZE}x${SIZE}/apps RENAME ${PROJECT_NAME}.png)
+endforeach()
 
 # Helper
 add_executable(${PROJECT_NAME}_helper
@@ -142,11 +139,15 @@ target_link_libraries(${PROJECT_NAME}_helper
     PolkitQt5-1::Core
 )
 
-install(TARGETS ${PROJECT_NAME}_helper DESTINATION ${KDE_INSTALL_LIBEXECDIR})
-install(FILES data/dev.jonmagon.kdiskmark.helperinterface.conf DESTINATION ${KDE_INSTALL_DBUSDIR}/system.d)
+install(TARGETS ${PROJECT_NAME}_helper DESTINATION ${CMAKE_INSTALL_LIBEXECDIR})
+install(FILES data/dev.jonmagon.kdiskmark.helperinterface.conf DESTINATION share/dbus-1/system.d)
 
 install(FILES data/dev.jonmagon.kdiskmark.helper.policy DESTINATION ${POLKITQT-1_POLICY_FILES_INSTALL_DIR})
-ecm_install_configured_files(
-    INPUT data/dev.jonmagon.kdiskmark.helperinterface.service.in
-    DESTINATION ${KDE_INSTALL_DBUSDIR}/system-services
+set(KDE_INSTALL_FULL_LIBEXECDIR ${CMAKE_INSTALL_LIBEXECDIR})
+configure_file(
+    data/dev.jonmagon.kdiskmark.helperinterface.service.in
+    data/dev.jonmagon.kdiskmark.helperinterface.service @ONLY
+)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/data/dev.jonmagon.kdiskmark.helperinterface.service
+    DESTINATION share/dbus-1/system-services
 )