diff -urNp -x '*.orig' courier-1.0.9.org/courier/filters/Makefile.am courier-1.0.9/courier/filters/Makefile.am
--- courier-1.0.9.org/courier/filters/Makefile.am	2019-02-03 21:11:16.000000000 +0100
+++ courier-1.0.9/courier/filters/Makefile.am	2021-05-07 22:54:50.187816338 +0200
@@ -21,7 +21,7 @@ courierfilterexec_PROGRAMS=courierfilter
 
 noinst_SCRIPTS=courierfilter.start
 
-filterbindir=$(libexecdir)/filters
+filterbindir=$(libexecdir)/courier/filters
 filterbin_PROGRAMS=dupfilter ratefilter verifyfilter
 bin_SCRIPTS=verifysmtp
 
diff -urNp -x '*.orig' courier-1.0.9.org/courier/filters/filterctl.in courier-1.0.9/courier/filters/filterctl.in
--- courier-1.0.9.org/courier/filters/filterctl.in	2018-06-10 03:51:05.000000000 +0200
+++ courier-1.0.9/courier/filters/filterctl.in	2021-05-07 22:54:50.187816338 +0200
@@ -11,7 +11,7 @@ sysconfdir="@sysconfdir@"
 localstatedir="@localstatedir@"
 piddir="@piddir@"
 
-filterbindir="${libexecdir}/filters"
+filterbindir="${libexecdir}/courier/filters"
 filteractivedir="${sysconfdir}/filters/active"
 pidfile="${piddir}/courierfilter.pid"
 
diff -urNp -x '*.orig' courier-1.0.9.org/courier/filters/perlfilter/Makefile.am courier-1.0.9/courier/filters/perlfilter/Makefile.am
--- courier-1.0.9.org/courier/filters/perlfilter/Makefile.am	2018-07-29 05:19:55.000000000 +0200
+++ courier-1.0.9/courier/filters/perlfilter/Makefile.am	2021-05-07 22:54:50.187816338 +0200
@@ -9,7 +9,7 @@ BUILT_SOURCES=filtersocketdir.h wrapperp
 
 CLEANFILES=$(BUILT_SOURCES) permissions.dat
 
-filterbindir=$(libexecdir)/filters
+filterbindir=$(libexecdir)/courier/filters
 filterbin_PROGRAMS=@perlfilter_prog@
 
 scriptdir=$(datadir)