On Saturday 2021-10-30 18:01, Jeremy Sowden wrote: >diff --git a/input/Makefile.am b/input/Makefile.am >index 8f2e934fcdfa..668fc2b1444a 100644 >--- a/input/Makefile.am >+++ b/input/Makefile.am >@@ -1 +1,9 @@ >-SUBDIRS = packet flow sum >+if BUILD_NFCT >+ OPT_SUBDIR_FLOW = flow >+endif >+ >+if BUILD_NFACCT >+ OPT_SUBDIR_SUM = sum >+endif >+ >+SUBDIRS = packet $(OPT_SUBDIR_FLOW) $(OPT_SUBDIR_SUM) You use += in a previous patch, so why not use it here as well. SUBDIRS = packet if BUILD_NFCT SUBDIRS += flow endif if BUILD_NFACCT SUBDIRS += sum endif