--- CMakeLists.txt.orig	2020-08-12 18:05:20 UTC
+++ CMakeLists.txt
@@ -12,6 +12,8 @@ elseif(CMAKE_SYSTEM_NAME MATCHES Darwin)
   message(FATAL_ERROR "Redkite is not implemented yet for Mac OS X")
 elseif (CMAKE_SYSTEM_NAME MATCHES Linux)
   message(STATUS " Build Redkite for GNU/Linux")
+elseif (CMAKE_SYSTEM_NAME MATCHES "^(FreeBSD|DragonFly)$")
+  message(STATUS " Build Redkite for FreeBSD")
 else()
   message(FATAL_ERROR "Redkite is not implemented yet for ${CMAKE_SYSTEM_NAME}")
 endif()