diff --git a/dbus-soundrecorder/CMakeLists.txt b/dbus-soundrecorder/CMakeLists.txt
index 392c8ac..1d59e67 100644
--- a/dbus-soundrecorder/CMakeLists.txt
+++ b/dbus-soundrecorder/CMakeLists.txt
@@ -5,7 +5,6 @@ set(SUBDIRS_PREFIX "../..")
 enable_testing()
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH true)
-include_directories(BEFORE SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIRS_PREFIX}")
 
 add_subdirectory(${SUBDIRS_PREFIX}/c++utilities c++utilities)
 list(APPEND CMAKE_MODULE_PATH ${CPP_UTILITIES_SOURCE_DIR}/cmake/modules)
diff --git a/geocoordinatecalculator/CMakeLists.txt b/geocoordinatecalculator/CMakeLists.txt
index 645e89e..2045293 100644
--- a/geocoordinatecalculator/CMakeLists.txt
+++ b/geocoordinatecalculator/CMakeLists.txt
@@ -5,7 +5,6 @@ set(SUBDIRS_PREFIX "../..")
 enable_testing()
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH true)
-include_directories(BEFORE SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIRS_PREFIX}")
 
 add_subdirectory(${SUBDIRS_PREFIX}/c++utilities c++utilities)
 list(APPEND CMAKE_MODULE_PATH ${CPP_UTILITIES_SOURCE_DIR}/cmake/modules)
diff --git a/passwordmanager/CMakeLists.txt b/passwordmanager/CMakeLists.txt
index a2e379a..bed1d3f 100644
--- a/passwordmanager/CMakeLists.txt
+++ b/passwordmanager/CMakeLists.txt
@@ -5,7 +5,6 @@ set(SUBDIRS_PREFIX "../..")
 enable_testing()
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH true)
-include_directories(BEFORE SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIRS_PREFIX}")
 
 add_subdirectory(${SUBDIRS_PREFIX}/c++utilities c++utilities)
 list(APPEND CMAKE_MODULE_PATH ${CPP_UTILITIES_SOURCE_DIR}/cmake/modules)
diff --git a/repoindex/CMakeLists.txt b/repoindex/CMakeLists.txt
index 5be7f40..3f25382 100644
--- a/repoindex/CMakeLists.txt
+++ b/repoindex/CMakeLists.txt
@@ -5,7 +5,6 @@ set(SUBDIRS_PREFIX "../..")
 enable_testing()
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH true)
-include_directories(BEFORE SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIRS_PREFIX}")
 
 add_subdirectory(${SUBDIRS_PREFIX}/c++utilities c++utilities)
 list(APPEND CMAKE_MODULE_PATH ${CPP_UTILITIES_SOURCE_DIR}/cmake/modules)
diff --git a/syncthingtray/CMakeLists.txt b/syncthingtray/CMakeLists.txt
index eca6947..cad0c9b 100644
--- a/syncthingtray/CMakeLists.txt
+++ b/syncthingtray/CMakeLists.txt
@@ -5,7 +5,6 @@ set(SUBDIRS_PREFIX "../..")
 enable_testing()
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH true)
-include_directories(BEFORE SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIRS_PREFIX}")
 
 add_subdirectory(${SUBDIRS_PREFIX}/c++utilities c++utilities)
 list(APPEND CMAKE_MODULE_PATH ${CPP_UTILITIES_SOURCE_DIR}/cmake/modules)
diff --git a/tageditor/CMakeLists.txt b/tageditor/CMakeLists.txt
index 9f50c9e..a21a80c 100644
--- a/tageditor/CMakeLists.txt
+++ b/tageditor/CMakeLists.txt
@@ -5,7 +5,6 @@ set(SUBDIRS_PREFIX "../..")
 enable_testing()
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH true)
-include_directories(BEFORE SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIRS_PREFIX}")
 
 add_subdirectory(${SUBDIRS_PREFIX}/c++utilities c++utilities)
 list(APPEND CMAKE_MODULE_PATH ${CPP_UTILITIES_SOURCE_DIR}/cmake/modules)
diff --git a/videodownloader/CMakeLists.txt b/videodownloader/CMakeLists.txt
index 61dfd9a..c0af85b 100644
--- a/videodownloader/CMakeLists.txt
+++ b/videodownloader/CMakeLists.txt
@@ -5,7 +5,6 @@ set(SUBDIRS_PREFIX "../..")
 enable_testing()
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH true)
-include_directories(BEFORE SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIRS_PREFIX}")
 
 add_subdirectory(${SUBDIRS_PREFIX}/c++utilities c++utilities)
 list(APPEND CMAKE_MODULE_PATH ${CPP_UTILITIES_SOURCE_DIR}/cmake/modules)