diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8e72288eef..8ccd4dc359 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,6 +17,7 @@ set(KWIN_VERSION_MAJOR 4)
 set(KWIN_VERSION_MINOR 90)
 set(KWIN_VERSION_PATCH 1)
 set(KWIN_VERSION ${KWIN_VERSION_MAJOR}.${KWIN_VERSION_MINOR}.${KWIN_VERSION_PATCH} )
+set(KWIN_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
 if(KWIN_PLASMA_ACTIVE)
     set(KWIN_BUILD_DECORATIONS OFF)
diff --git a/kcmkwin/kwindecoration/CMakeLists.txt b/kcmkwin/kwindecoration/CMakeLists.txt
index 1e27973087..620ffead58 100644
--- a/kcmkwin/kwindecoration/CMakeLists.txt
+++ b/kcmkwin/kwindecoration/CMakeLists.txt
@@ -1,9 +1,9 @@
 # need a header file from Aurorae sources
 include_directories(
-    ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/clients/aurorae/src/lib
+    ${KWIN_SOURCE_DIR}/clients/aurorae/src/lib
 )
 
-set(AURORAE_SOURCE_DIR ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/clients/aurorae/src/lib/)
+set(AURORAE_SOURCE_DIR ${KWIN_SOURCE_DIR}/clients/aurorae/src/lib/)
 
 set(kcm_kwindecoration_PART_SRCS
     kwindecoration.cpp
diff --git a/kcmkwin/kwinscreenedges/CMakeLists.txt b/kcmkwin/kwinscreenedges/CMakeLists.txt
index b9c07b1806..4e30e70454 100644
--- a/kcmkwin/kwinscreenedges/CMakeLists.txt
+++ b/kcmkwin/kwinscreenedges/CMakeLists.txt
@@ -1,5 +1,3 @@
-include_directories( ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin )
-
 set(
     kcm_kwinscreenedges_PART_SRCS
     main.cpp
diff --git a/kcmkwin/kwintabbox/CMakeLists.txt b/kcmkwin/kwintabbox/CMakeLists.txt
index 047381d378..e736b449dc 100644
--- a/kcmkwin/kwintabbox/CMakeLists.txt
+++ b/kcmkwin/kwintabbox/CMakeLists.txt
@@ -1,4 +1,4 @@
-include_directories( ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/tabbox ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/)
+include_directories( ${KWIN_SOURCE_DIR}/tabbox ${KWIN_SOURCE_DIR})
 
 ########### next target ###############
 
@@ -6,7 +6,7 @@ set(kcm_kwintabbox_PART_SRCS
     main.cpp
     layoutpreview.cpp
     thumbnailitem.cpp
-    ${KDEBASE_WORKSPACE_SOURCE_DIR}/kwin/tabbox/tabboxconfig.cpp
+    ${KWIN_SOURCE_DIR}/tabbox/tabboxconfig.cpp
 )
 
 qt5_wrap_ui( kcm_kwintabbox_PART_SRCS main.ui )