--- pdns/Makefile.am.orig	2020-04-06 22:07:50.000000000 +1000
+++ pdns/Makefile.am	2020-08-02 01:04:15.047331000 +1000
@@ -1363,6 +1363,11 @@
 testrunner_LDADD += $(LIBDECAF_LIBS)
 endif
 
+if HAVE_BSDSUNIX
+ixfrdist_SOURCES += kqueuemplexer.cc
+testrunner_SOURCES += kqueuemplexer.cc
+endif
+
 if HAVE_FREEBSD
 ixfrdist_SOURCES += kqueuemplexer.cc
 testrunner_SOURCES += kqueuemplexer.cc