Invoke autoreconf and configure in %conf rather than in %build

arpwatch.spec

@@ -126,7 +126,7 @@ awk '/^ \* / { print substr($0, 4); } /^ \*\// { exit }' arpwatch.c |
   tee LICENSE
 
 
-%build
+%conf
 %if %{with autoreconf}
 autoreconf --force --install --verbose
 %endif
@@ -139,6 +139,8 @@ export CPPFLAGS="${CPPFLAGS-} -DTIME_WITH_SYS_TIME=1"
 
 %configure --with-sendmail=/usr/sbin/sendmail PYTHON=%{python3}
 
+
+%build
 %make_build ARPDIR=%{pkgstatedir}