--- kumir2-2.1.0-rc9/cmake/kumir2/kumir2_linux.cmake	2017-04-21 16:46:28.000000000 +0000
+++ ./kumir2_linux.cmake	2018-07-19 21:53:05.980000000 +0000
@@ -2,11 +2,13 @@
 # should be placed into 'lib' subdirectory of /usr [/usr/local].
 # Some distributions have distinct lib64 directory for 64-bit libraries.
 # LIB_BASENAME value is a correct 'lib' dir name for current distro.
+if(NOT DEFINED LIB_BASENAME)
 if((${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64") AND NOT (EXISTS /etc/ubuntu-release) AND NOT (EXISTS /etc/debian_version))
     set(LIB_BASENAME lib64)
 else()
     set(LIB_BASENAME lib)
 endif()
+endif(NOT DEFINED LIB_BASENAME)
 
 # Build filesystem layout, according to LSB
 set(KUMIR2_EXEC_DIR "bin")                                  # executable binaries