message: Need to add FORCE when building the xversionkeys.h in Makefile.am
diff: @@ -223,7 +223,7 @@ obj/build.h: FORCE
  $(abs_top_srcdir)
  libbitcoin_util_a-clientversion.$(OBJEXT): obj/build.h
  -xversionkeys.h:
  +xversionkeys.h: FORCE
  $(PYTHON) $(top_srcdir)/contrib/devtools/xversionkeys.py > $(abs_top_builddir)/src/xversionkeys.h < $(srcdir)/xversionkeys.dat
  BUILT_SOURCES= xversionkeys.h
  