+# damn. need it here! - copied from /usr/lib/rpm/macros.build
+%tmpdir %(echo "${TMPDIR:-/tmp}")
+%patchset_source(f:b:) %(
+ base=%{-b*}%{!-b*:10000};
+ start=$(expr $base + %1);
+ end=$(expr $base + %{?2}%{!?2:%{1}});
+ # we need to call seq twice as it doesn't allow two formats
+ seq -f 'Patch%g:' $start $end > %{tmpdir}/__ps1;
+ seq -f '%{-f*}' %1 %{?2}%{!?2:%{1}} > %{tmpdir}/__ps2;
+ paste %{tmpdir}/__ps{1,2};
+ rm -f %{tmpdir}/__ps{1,2};
+) \
+%{nil}