diff -Nru libcpandb-perl-0.18/debian/changelog libcpandb-perl-0.18/debian/changelog
--- libcpandb-perl-0.18/debian/changelog	2022-12-06 15:10:53.000000000 +0000
+++ libcpandb-perl-0.18/debian/changelog	2023-07-01 13:57:36.000000000 +0000
@@ -1,3 +1,14 @@
+libcpandb-perl (0.18-4) unstable; urgency=medium
+
+  * Add patch to make Makefile.PL work without Module::Install::DSL.
+    Thanks to Niko Tyni for the bug report. (Closes: #1040030)
+  * Update years of packaging copyright.
+  * Declare compliance with Debian Policy 4.6.2.
+  * Set Rules-Requires-Root: no.
+  * Annotate test-only build dependencies with <!nocheck>.
+
+ -- gregor herrmann <gregoa@debian.org>  Sat, 01 Jul 2023 15:57:36 +0200
+
 libcpandb-perl (0.18-3) unstable; urgency=medium
 
   [ Xavier Guimard ]
diff -Nru libcpandb-perl-0.18/debian/control libcpandb-perl-0.18/debian/control
--- libcpandb-perl-0.18/debian/control	2022-12-06 15:10:53.000000000 +0000
+++ libcpandb-perl-0.18/debian/control	2023-07-01 13:57:36.000000000 +0000
@@ -6,17 +6,19 @@
 Section: perl
 Testsuite: autopkgtest-pkg-perl
 Priority: optional
-Build-Depends: debhelper-compat (= 13), libmodule-install-perl
-Build-Depends-Indep: libdatetime-perl,
-                     liblwp-online-perl,
-                     liborlite-mirror-perl,
-                     liborlite-perl,
-                     libparams-util-perl,
+Build-Depends: debhelper-compat (= 13),
+               libmodule-install-perl
+Build-Depends-Indep: libdatetime-perl <!nocheck>,
+                     liblwp-online-perl <!nocheck>,
+                     liborlite-mirror-perl <!nocheck>,
+                     liborlite-perl <!nocheck>,
+                     libparams-util-perl <!nocheck>,
                      perl
-Standards-Version: 4.1.5
+Standards-Version: 4.6.2
 Vcs-Browser: https://salsa.debian.org/perl-team/modules/packages/libcpandb-perl
 Vcs-Git: https://salsa.debian.org/perl-team/modules/packages/libcpandb-perl.git
 Homepage: https://metacpan.org/release/CPANDB
+Rules-Requires-Root: no
 
 Package: libcpandb-perl
 Architecture: all
diff -Nru libcpandb-perl-0.18/debian/copyright libcpandb-perl-0.18/debian/copyright
--- libcpandb-perl-0.18/debian/copyright	2022-12-06 15:10:53.000000000 +0000
+++ libcpandb-perl-0.18/debian/copyright	2023-07-01 13:57:36.000000000 +0000
@@ -16,7 +16,7 @@
 Files: debian/*
 Copyright: 2009, Jonathan Yu <jawnsy@cpan.org>
  2010, Ansgar Burchardt <ansgar@debian.org>
- 2011-2018, gregor herrmann <gregoa@debian.org>
+ 2011-2023, gregor herrmann <gregoa@debian.org>
  2013, Xavier Guimard <yadd@debian.org>
 License: Artistic or GPL-1+
 
diff -Nru libcpandb-perl-0.18/debian/patches/Module::Install::DSL.patch libcpandb-perl-0.18/debian/patches/Module::Install::DSL.patch
--- libcpandb-perl-0.18/debian/patches/Module::Install::DSL.patch	1970-01-01 00:00:00.000000000 +0000
+++ libcpandb-perl-0.18/debian/patches/Module::Install::DSL.patch	2023-07-01 13:57:36.000000000 +0000
@@ -0,0 +1,29 @@
+Description: Module::Install::DSL is gone from Module-Install as of 1.20.
+Origin: vendor
+Author: gregor herrmann <gregoa@debian.org>
+Last-Update: 2023-07-01
+Forwarded: https://rt.cpan.org/Ticket/Display.html?id=148870
+Bug: https://rt.cpan.org/Ticket/Display.html?id=148870
+
+--- a/Makefile.PL
++++ b/Makefile.PL
+@@ -1,9 +1,11 @@
+-use inc::Module::Install::DSL 1.06;
++use inc::Module::Install;
+ 
+-all_from       lib/CPANDB.pm
+-requires_from  lib/CPANDB.pm
+-requires_from  lib/CPANDB/Distribution.pm
+-requires_from  script/cpangraph
+-test_requires  Test::More  0.42
+-test_requires  LWP::Online 1.07
+-install_script cpangraph
++all_from       'lib/CPANDB.pm';
++requires_from  'lib/CPANDB.pm';
++requires_from  'lib/CPANDB/Distribution.pm';
++requires_from  'script/cpangraph';
++test_requires  'Test::More' => '0.42';
++test_requires  'LWP::Online' => '1.07';
++install_script 'cpangraph';
++
++WriteAll;
diff -Nru libcpandb-perl-0.18/debian/patches/series libcpandb-perl-0.18/debian/patches/series
--- libcpandb-perl-0.18/debian/patches/series	1970-01-01 00:00:00.000000000 +0000
+++ libcpandb-perl-0.18/debian/patches/series	2023-07-01 13:57:36.000000000 +0000
@@ -0,0 +1 @@
+Module::Install::DSL.patch