--- library/rt-backends/CMakeLists.txt.orig	2018-02-26 17:05:42 UTC
+++ library/rt-backends/CMakeLists.txt
@@ -17,7 +17,7 @@
 #add_subdirectory(dummy-in)
 #add_subdirectory(dummy-out)
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|FreeBSD")
     if(ALSA_FOUND)
 	add_subdirectory(alsa-in)
 	add_subdirectory(alsa-out)
