--- CMakeLists.txt.orig	2015-07-06 08:07:23 UTC
+++ CMakeLists.txt
@@ -277,6 +277,9 @@ file(GLOB MANPAGES
   RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
   man/nvim.1)
 
+unset(CMAKE_INSTALL_MANDIR)
+set(CMAKE_INSTALL_MANDIR ${CMAKE_INSTALL_PREFIX}/man)
+
 install_helper(
   FILES ${MANPAGES}
   DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
