diff --git a/Breeze-dark-gtk/CMakeLists.txt b/Breeze-dark-gtk/CMakeLists.txt
--- a/Breeze-dark-gtk/CMakeLists.txt
+++ b/Breeze-dark-gtk/CMakeLists.txt
@@ -3,8 +3,6 @@
 install(DIRECTORY assets DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze-Dark
         ${directory_EXCLUDES})
 
-if (PKG_GTK_VERSION VERSION_LESS "3.20")
-install(FILES gtk-3.18/gtk.css DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze-Dark/gtk-3.0/)
-else()
-install(FILES gtk-3.20/gtk.css DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze-Dark/gtk-3.0/)
-endif()
+install(DIRECTORY gtk-3.0 DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze-Dark)
+install(DIRECTORY gtk-3.18 DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze-Dark)
+install(DIRECTORY gtk-3.20 DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze-Dark)
diff --git a/Breeze-gtk/CMakeLists.txt b/Breeze-gtk/CMakeLists.txt
--- a/Breeze-gtk/CMakeLists.txt
+++ b/Breeze-gtk/CMakeLists.txt
@@ -3,8 +3,6 @@
 install(DIRECTORY assets DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze
         ${directory_EXCLUDES})
 
-if (PKG_GTK_VERSION VERSION_LESS "3.20")
-install(FILES gtk-3.18/gtk.css DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze/gtk-3.0/)
-else()
-install(FILES gtk-3.20/gtk.css DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze/gtk-3.0/)
-endif()
+install(DIRECTORY gtk-3.0 DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze)
+install(DIRECTORY gtk-3.18 DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze)
+install(DIRECTORY gtk-3.20 DESTINATION ${KDE_INSTALL_FULL_DATAROOTDIR}/themes/Breeze)
diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,9 +10,6 @@
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR} "${CMAKE_SOURCE_DIR}/cmake")
 find_package(GTKEngine)
 
-find_package(PkgConfig)
-pkg_check_modules(PKG_GTK REQUIRED gtk+-3.0)
-
 include(KDEInstallDirs)
 
 # Exclude these patterns when installing directories as they have no use