diff --git a/CMakeLists.txt b/CMakeLists.txt
index 86f6de3a..b8553e93 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,8 +5,7 @@ enable_language(CXX)
 
 # common XO cmake macros (see proj/xo-cmake)
 include(xo_macros/xo_cxx)
-include(cmake/nestlog.cmake)
-include(cmake/code-coverage.cmake)
+include(xo_macros/code-coverage)
 
 enable_testing()
 # activate code coverage for all executables + libraries (when -DCODE_COVERAGE=ON)
@@ -19,25 +18,7 @@ add_code_coverage()
 #
 add_code_coverage_all_targets(EXCLUDE /nix/store/* utest/*)
 
-set(CMAKE_CXX_STANDARD 20)
-set(CMAKE_CXX_STANDARD_REQUIRED True)
-
-# always write compile_commands.json
-set(CMAKE_EXPORT_COMPILE_COMMANDS ON CACHE INTERNAL "")
-
-if(NOT USER)
-    set(USER $ENV{USER})
-endif()
-
-# hmm. this works if explicitly given with cmake:
-#    cmake -DCMAKE_INSTALL_PREFIX=/home/roland/local path/to/source
-# but not as default
-if(NOT CMAKE_INSTALL_PREFIX)
-    set(CMAKE_INSTALL_PREFIX /home/${USER}/local CACHE STRING "install directory")
-endif()
-if(NOT CMAKE_INSTALL_RPATH)
-    set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib CACHE STRING "runpath in installed libraries/executables")
-endif()
+xo_toplevel_compile_options()
 
 add_subdirectory(example)
 add_subdirectory(utest)
@@ -46,10 +27,11 @@ add_subdirectory(utest)
 # see [[https://stackoverflow.com/questions/47718485/install-and-export-interface-only-library-cmake]]
 #
 add_library(indentlog INTERFACE)
-target_include_directories(indentlog INTERFACE
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-  $<INSTALL_INTERFACE:include>
-  )
+xo_include_headeronly_options2(indentlog)
+#target_include_directories(indentlog INTERFACE
+#  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+#  $<INSTALL_INTERFACE:include>
+#  )
 
 # ----------------------------------------------------------------
 # provide find_package() support
@@ -60,36 +42,6 @@ xo_export_cmake_config(${PROJECT_NAME} ${PROJECT_VERSION} ${PROJECT_NAME}Targets
 
 xo_install_library2(${PROJECT_NAME})
 
-#include(CMakePackageConfigHelpers)
-#write_basic_package_version_file("${PROJECT_BINARY_DIR}/indentlogConfigVersion.cmake"
-#    VERSION 0.1
-#    COMPATIBILITY AnyNewerVersion
-#)
-#
-#install(
-#    TARGETS indentlog
-#    EXPORT indentlogTargets
-#    LIBRARY DESTINATION lib COMPONENT Runtime
-#    ARCHIVE DESTINATION lib COMPONENT Development
-#    RUNTIME DESTINATION bin COMPONENT Runtime
-#    PUBLIC_HEADER DESTINATION include COMPONENT Development
-#    BUNDLE DESTINATION bin COMPONENT Runtime
-#    )
-
-#include(CMakePackageConfigHelpers)
-#configure_package_config_file(
-#    "${PROJECT_SOURCE_DIR}/cmake/indentlogConfig.cmake.in"
-#    "${PROJECT_BINARY_DIR}/indentlogConfig.cmake"
-#    INSTALL_DESTINATION lib/cmake/indentlog
-#    )
-#
-#install(EXPORT indentlogTargets DESTINATION lib/cmake/indentlog)
-#install(
-#    FILES
-#    "${PROJECT_BINARY_DIR}/indentlogConfigVersion.cmake"
-#    "${PROJECT_BINARY_DIR}/indentlogConfig.cmake"
-#    DESTINATION lib/cmake/indentlog)
-
 # ----------------------------------------------------------------
 # install .hpp
 
diff --git a/example/ex1/CMakeLists.txt b/example/ex1/CMakeLists.txt
index 6af29d79..a9d1b27d 100644
--- a/example/ex1/CMakeLists.txt
+++ b/example/ex1/CMakeLists.txt
@@ -1,2 +1,2 @@
 add_executable(ex1 ex1.cpp)
-xo_include_options(ex1)
+xo_include_options2(ex1)
diff --git a/example/ex2/CMakeLists.txt b/example/ex2/CMakeLists.txt
index 1ac5735a..20026b03 100644
--- a/example/ex2/CMakeLists.txt
+++ b/example/ex2/CMakeLists.txt
@@ -1,2 +1,2 @@
 add_executable(ex2 ex2.cpp)
-xo_include_options(ex2)
+xo_include_options2(ex2)
diff --git a/example/ex3/CMakeLists.txt b/example/ex3/CMakeLists.txt
index d81e0e99..9791a931 100644
--- a/example/ex3/CMakeLists.txt
+++ b/example/ex3/CMakeLists.txt
@@ -1,2 +1,2 @@
 add_executable(ex3 ex3.cpp)
-xo_include_options(ex3)
+xo_include_options2(ex3)
diff --git a/example/ex4/CMakeLists.txt b/example/ex4/CMakeLists.txt
index 02c1f301..2a6b9c31 100644
--- a/example/ex4/CMakeLists.txt
+++ b/example/ex4/CMakeLists.txt
@@ -1,2 +1,2 @@
 add_executable(ex4 ex4.cpp)
-xo_include_options(ex4)
+xo_include_options2(ex4)
diff --git a/example/hello/CMakeLists.txt b/example/hello/CMakeLists.txt
index d6f694e6..1ff23000 100644
--- a/example/hello/CMakeLists.txt
+++ b/example/hello/CMakeLists.txt
@@ -1,2 +1,2 @@
 add_executable(hello hello.cpp)
-xo_include_options(hello)
+xo_include_options2(hello)
diff --git a/utest/CMakeLists.txt b/utest/CMakeLists.txt
index a135895a..19bf25e6 100644
--- a/utest/CMakeLists.txt
+++ b/utest/CMakeLists.txt
@@ -7,7 +7,7 @@ set(SELF_SOURCE_FILES
     indentlog_utest_main.cpp)
 
 add_executable(${SELF_EXECUTABLE_NAME} ${SELF_SOURCE_FILES})
-xo_include_options(${SELF_EXECUTABLE_NAME})
+xo_include_options2(${SELF_EXECUTABLE_NAME})
 
 add_test(NAME ${SELF_EXECUTABLE_NAME} COMMAND ${SELF_EXECUTABLE_NAME})
 target_code_coverage(${SELF_EXECUTABLE_NAME} AUTO ALL)