Index: head/net-mgmt/icinga2/files/patch-third-party__cmake__GNUInstallDirs.cmake
===================================================================
--- head/net-mgmt/icinga2/files/patch-third-party__cmake__GNUInstallDirs.cmake	(revision 372098)
+++ head/net-mgmt/icinga2/files/patch-third-party__cmake__GNUInstallDirs.cmake	(revision 372099)
@@ -1,11 +1,11 @@
 --- third-party/cmake/GNUInstallDirs.cmake.orig	2014-10-03 15:04:47.712808574 +0200
 +++ third-party/cmake/GNUInstallDirs.cmake	2014-10-03 15:05:17.916805737 +0200
 @@ -166,7 +166,7 @@
    set(CMAKE_INSTALL_DATADIR "${CMAKE_INSTALL_DATAROOTDIR}")
  endif()
  
 -if(CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
-+if(CMAKE_SYSTEM_NAME MATCHES "^(FreeBSD|OpenBSD)$")
++if(CMAKE_SYSTEM_NAME MATCHES "^(DragonFly|FreeBSD|OpenBSD)$")
    if(NOT CMAKE_INSTALL_INFODIR)
      set(CMAKE_INSTALL_INFODIR "" CACHE PATH "info documentation (info)")
      set(CMAKE_INSTALL_INFODIR "info")