diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0432aaf..4643462 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,7 +47,7 @@ if (NOT CMAKE_CONFIGURATION_TYPES)
 endif()
 
 #--- add version files ---------------------------------------------------------
-configure_file(${CMAKE_SOURCE_DIR}/k4SimDelphesVersion.h
+configure_file(${PROJECT_SOURCE_DIR}/k4SimDelphesVersion.h
                ${CMAKE_BINARY_DIR}/k4SimDelphesVersion.h )
 install(FILES ${CMAKE_BINARY_DIR}/k4SimDelphesVersion.h
   DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/k4SimDelphes )
diff --git a/cmake/k4SimDelphesCPack.cmake b/cmake/k4SimDelphesCPack.cmake
index 588b25e..da79638 100644
--- a/cmake/k4SimDelphesCPack.cmake
+++ b/cmake/k4SimDelphesCPack.cmake
@@ -16,9 +16,9 @@ set(CPACK_DEBIAN_PACKAGE_MAINTAINER "valentin.volkl@cern.ch")
 set(CPACK_DEBIAN_PACKAGE_HOMEPAGE ${CPACK_PACKAGE_HOMEPAGE_URL})
 set(CPACK_DEBIAN_PACKAGE_RECOMMENDS "delphes, edm4hep")
 
-set(CPACK_PACKAGE_DESCRIPTION_FILE "${CMAKE_SOURCE_DIR}/README.md")
-set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/LICENSE")
-set(CPACK_RESOURCE_FILE_README "${CMAKE_SOURCE_DIR}/README.md")
+set(CPACK_PACKAGE_DESCRIPTION_FILE "${PROJECT_SOURCE_DIR}/README.md")
+set(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/LICENSE")
+set(CPACK_RESOURCE_FILE_README "${PROJECT_SOURCE_DIR}/README.md")
 
 #--- source package settings ---------------------------------------------------
 set(CPACK_SOURCE_IGNORE_FILES
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index f22fda8..6aec16a 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -7,8 +7,8 @@ add_executable(compare_delphes_converter_outputs src/compare_delphes_converter_o
 target_include_directories(compare_delphes_converter_outputs
   PRIVATE
   ${DELPHES_INCLUDE_DIRS}
-  ${CMAKE_SOURCE_DIR}/converter/src #for delphesHelpers
-  ${CMAKE_SOURCE_DIR}/converter/include
+  ${PROJECT_SOURCE_DIR}/converter/src #for delphesHelpers
+  ${PROJECT_SOURCE_DIR}/converter/include
   )
 target_link_libraries(compare_delphes_converter_outputs PRIVATE EDM4HEP::edm4hep ${DELPHES_LIBRARY} podio::podioRootIO ROOT::Physics)
 
@@ -26,7 +26,7 @@ function(ADD_COMPARISON_TEST name converter)
   endif()
 
   add_test(NAME ${name}
-    COMMAND bash -x ${CMAKE_SOURCE_DIR}/tests/testDriver.sh ${converter} ${ARGN})
+    COMMAND bash -x ${PROJECT_SOURCE_DIR}/tests/testDriver.sh ${converter} ${ARGN})
 
   set_property(TEST ${name} PROPERTY ENVIRONMENT
     LD_LIBRARY_PATH=$<TARGET_FILE_DIR:DelphesEDM4HepConverter>:$<TARGET_FILE_DIR:EDM4HEP::edm4hepDict>:$<TARGET_FILE_DIR:podio::podioDict>:$<TARGET_FILE_DIR:ROOT::RIO>:$ENV{LD_LIBRARY_PATH}
@@ -35,13 +35,13 @@ function(ADD_COMPARISON_TEST name converter)
     )
 endfunction()
 
-set(OUTPUT_CONFIG ${CMAKE_SOURCE_DIR}/examples/edm4hep_output_config.tcl)
+set(OUTPUT_CONFIG ${PROJECT_SOURCE_DIR}/examples/edm4hep_output_config.tcl)
 
 # Get the delphes card from the Delphes installation
 find_file(DELPHES_CARD delphes_card_IDEA.tcl PATHS ${DELPHES_CARDS_DIR})
 if(DELPHES_CARD)
   if(BUILD_PYTHIA_READER)
-    ADD_COMPARISON_TEST(PythiaConverter_ee_Z_bbbar DelphesPythia8_EDM4HEP ${DELPHES_CARD} ${OUTPUT_CONFIG} pythia_converter_output_ee_Z_bbbar.root ${CMAKE_SOURCE_DIR}/examples/data/ee_Z_bbbar_ecm91GeV.cmd)
+    ADD_COMPARISON_TEST(PythiaConverter_ee_Z_bbbar DelphesPythia8_EDM4HEP ${DELPHES_CARD} ${OUTPUT_CONFIG} pythia_converter_output_ee_Z_bbbar.root ${PROJECT_SOURCE_DIR}/examples/data/ee_Z_bbbar_ecm91GeV.cmd)
   endif()
 else()
   message(WARNING "Cannot find IDEA delphes card from the delphes installation. Cannot use it for testing")
@@ -51,7 +51,7 @@ endif()
 find_file(DELPHES_CARD delphes_card_IDEA.tcl PATHS ${DELPHES_CARDS_DIR})
 if(DELPHES_CARD)
   if(BUILD_PYTHIA_READER)
-    ADD_COMPARISON_TEST(PythiaResonanceDecayFilter_pp_hhbbyy DelphesPythia8_EDM4HEP ${DELPHES_CARD} ${OUTPUT_CONFIG} pythia_resonance_decay_filter_pp_hhbbyy_output.root ${CMAKE_SOURCE_DIR}/examples/data/tester_pwp8_pp_hh_5f_hhbbyy.cmd --no-delphes)
+    ADD_COMPARISON_TEST(PythiaResonanceDecayFilter_pp_hhbbyy DelphesPythia8_EDM4HEP ${DELPHES_CARD} ${OUTPUT_CONFIG} pythia_resonance_decay_filter_pp_hhbbyy_output.root ${PROJECT_SOURCE_DIR}/examples/data/tester_pwp8_pp_hh_5f_hhbbyy.cmd --no-delphes)
   endif()
 else()
   message(WARNING "Cannot find IDEA delphes card from the delphes installation. Cannot use it for testing")