diff -urp mathgl-2.3.5.1/lang/CMakeLists.txt mathgl-2.3.5.1-nooctaveinstall/lang/CMakeLists.txt
--- mathgl-2.3.5.1/lang/CMakeLists.txt	2016-06-19 23:01:08.000000000 +0600
+++ mathgl-2.3.5.1-nooctaveinstall/lang/CMakeLists.txt	2016-12-27 10:04:11.786000696 +0700
@@ -125,12 +125,6 @@ message(STATUS "${oct_prog} ${oct_host}
 	)
 	add_custom_target(mgl_octave_module ALL DEPENDS mathgl.tar.gz)
 
-	install(FILES ${CMAKE_BINARY_DIR}/lang/mathgl.tar.gz DESTINATION ${MGL_DATA_PATH})
-	if(enable-octave-install)
-		install(CODE "execute_process(
-			COMMAND ${oct_exec} -q --eval \"pkg install mathgl.tar.gz\"
-			WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/lang )")
-	endif(enable-octave-install)
 	set(mgl_clean_files ${mgl_clean_files} mathgl)
 endif(enable-octave)
 set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES "${mgl_clean_files}")