diff --git a/CMLibCPackSources.cmake b/CMLibCPackSources.cmake
index 1b64724..cc8e693 100644
--- a/CMLibCPackSources.cmake
+++ b/CMLibCPackSources.cmake
@@ -1,8 +1,5 @@
 set(CPACK_PACKAGE_VERSION ${PROJECT_VERSION})
 set(CPACK_SOURCE_GENERATOR TXZ)
 set(CPACK_SOURCE_PACKAGE_FILE_NAME "${CMAKE_PROJECT_NAME}-${CPACK_PACKAGE_VERSION}")
-set(CPACK_IGNORE_FILE "cmake/etc/cpack_ignore.txt")
-file(STRINGS ${CPACK_IGNORE_FILE} CPACK_SOURCE_IGNORE_FILES)
-set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${CPACK_IGNORE_FILE})
 include(CPack)
 add_custom_target(dist COMMAND ${CMAKE_MAKE_PROGRAM} package_source)
diff --git a/CMLibCommon.cmake b/CMLibCommon.cmake
index 2ed57d7..49fbb06 100644
--- a/CMLibCommon.cmake
+++ b/CMLibCommon.cmake
@@ -18,9 +18,7 @@ set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 include(CMLibProjectVersion)
 set_project_version()
 
-include(CMLibOrganizationName)
-set_organization_name()
-
+include(CMLibRequiredVariables)
 include(CMLibGlobalVariables)
 include(CMLibLSBInfo)
 include(CMLibCompiler)
diff --git a/CMLibConfigHPPGenerate.cmake b/CMLibConfigHPPGenerate.cmake
index a51577e..0675ff6 100644
--- a/CMLibConfigHPPGenerate.cmake
+++ b/CMLibConfigHPPGenerate.cmake
@@ -3,7 +3,6 @@ function(cmlib_config_hpp_generate)
   cmlib_test_large_files(HAVE_LARGEFILES)
 
   get_property(PROJECT_VERSION_INT GLOBAL PROPERTY PROJECT_VERSION_INT)
-  get_property(ORGANIZATION_NAME GLOBAL PROPERTY ORGANIZATION_NAME)
   string(TOLOWER ${ORGANIZATION_NAME} ORGANIZATION_NAME_LOWER)
   string(TOUPPER ${ORGANIZATION_NAME} ORGANIZATION_NAME_UPPER)
   string(TOLOWER ${CMAKE_PROJECT_NAME} CMAKE_PROJECT_NAME_LOWER)
diff --git a/CMLibRequiredVariables.cmake b/CMLibRequiredVariables.cmake
new file mode 100644
index 0000000..f938974
--- /dev/null
+++ b/CMLibRequiredVariables.cmake
@@ -0,0 +1,35 @@
+if(NOT EXISTS "${CMAKE_SOURCE_DIR}/cmake/etc/Variables.cmake")
+  message(FATAL_ERROR "Required file cmake/etc/Variables.cmake does not exist")
+endif()
+
+include("${CMAKE_SOURCE_DIR}/cmake/etc/Variables.cmake")
+
+if(NOT ORGANIZATION_NAME)
+  message(FATAL_ERROR "Required variable ORGANIZATION_NAME is not defined")
+endif()
+
+set(CPACK_PACKAGE_VENDOR ${ORGANIZATION_NAME})
+
+if(NOT CPACK_GENERATOR)
+  message(FATAL_ERROR "Required variable CPACK_GENERATOR is not defined")
+endif()
+
+if(NOT CPACK_PACKAGE_CONTACT)
+  message(FATAL_ERROR "Required variable CPACK_PACKAGE_CONTACT is not defined")
+endif()
+
+if(NOT CPACK_PACKAGE_DESCRIPTION_SUMMARY)
+  message(FATAL_ERROR "Required variable CPACK_PACKAGE_DESCRIPTION_SUMMARY is not defined")
+endif()
+
+if(NOT CPACK_DEBIAN_PACKAGE_SECTION)
+  message(FATAL_ERROR "Required variable CPACK_DEBIAN_PACKAGE_SECTION is not defined")
+endif()
+
+if(NOT CPACK_DEBIAN_PACKAGE_PRIORITY)
+  message(FATAL_ERROR "Required variable CPACK_DEBIAN_PACKAGE_PRIORITY is not defined")
+endif()
+
+if(NOT CPACK_SOURCE_IGNORE_FILES)
+  message(FATAL_ERROR "Required variable CPACK_SOURCE_IGNORE_FILES is not defined")
+endif()