diff -Nru a/src/qt5ct/qt5ct.pro b/src/qt5ct/qt5ct.pro
--- a/src/qt5ct/qt5ct.pro	2016-08-10 14:47:44.000000000 +0200
+++ b/src/qt5ct/qt5ct.pro	2016-08-15 19:00:29.117854637 +0200
@@ -54,4 +54,10 @@
 desktop.files = qt5ct.desktop
 desktop.path = $$DATADIR/applications
 
-INSTALLS += target desktop
+qt5ct-sh.files = qt5ct.sh
+qt5ct-sh.path = /etc/profile.d
+
+qt5ct-csh.files = qt5ct.csh
+qt5ct-csh.path = /etc/profile.d
+
+INSTALLS += target desktop qt5ct-sh qt5ct-csh
diff -Nru a/src/qt5ct/qt5ct.sh b/src/qt5ct/qt5ct.sh
--- a/src/qt5ct/qt5ct.sh	1970-01-01 01:00:00.000000000 +0100
+++ b/src/qt5ct/qt5ct.sh	2016-08-15 19:36:18.012285931 +0200
@@ -0,0 +1,2 @@
+# Set the QT_QPA_PLATFORMTHEME environment variable
+export QT_QPA_PLATFORMTHEME='qt5ct'
diff -Nru a/src/qt5ct/qt5ct.csh b/src/qt5ct/qt5ct.csh
--- a/src/qt5ct/qt5ct.csh	1970-01-01 01:00:00.000000000 +0100
+++ b/src/qt5ct/qt5ct.csh	2016-08-15 19:36:09.314426469 +0200
@@ -0,0 +1,2 @@
+# Set the QT_QPA_PLATFORMTHEME environment variable
+setenv QT_QPA_PLATFORMTHEME 'qt5ct'
diff -Nrup a/src/qt5ct/CMakeLists.txt b/src/qt5ct/CMakeLists.txt
--- a/src/qt5ct/CMakeLists.txt	2023-02-28 19:40:15.000000000 +0100
+++ b/src/qt5ct/CMakeLists.txt	2023-03-08 07:23:40.720533798 +0100
@@ -31,3 +31,4 @@ add_executable(qt5ct ${app_SRCS})
 target_link_libraries(qt5ct PRIVATE Qt5::Widgets Qt5::Concurrent Qt5::WidgetsPrivate qt5ct-common)
 install(TARGETS qt5ct DESTINATION ${CMAKE_INSTALL_BINDIR})
 install(FILES qt5ct.desktop DESTINATION ${CMAKE_INSTALL_DATADIR}/applications)
+install(FILES qt5ct.sh qt5ct.csh DESTINATION /etc/profile.d)