--- CMakeLists.txt.orig	2018-12-16 21:09:15 UTC
+++ CMakeLists.txt
@@ -330,7 +330,7 @@ if (NN_ENABLE_DOC)
         )
         install (
             FILES ${CMAKE_CURRENT_BINARY_DIR}/${NAME}.${SECT}
-            DESTINATION ${CMAKE_INSTALL_MANDIR}/man${SECT}
+            DESTINATION man/man${SECT}
         )
 
     endmacro (add_libnanomsg_man)