Patch broken dh_lib

.drone.jsonnet

@@ -34,6 +34,7 @@ local deb_pipeline(image, buildarch='amd64', debarch='amd64', jobs=6) = {
                 'cd debian',
                 'eatmydata mk-build-deps -i -r --tool="' + apt_get_quiet + ' -o Debug::pkgProblemResolver=yes --no-install-recommends -y" control',
                 'cd ..',
+                'patch -i debian/dh-lib.patch /usr/share/perl5/Debian/Debhelper/Dh_Lib.pm', # patch debian bug #897569
                 'eatmydata gbp buildpackage --git-no-pbuilder --git-builder=\'debuild --preserve-envvar=CCACHE_*\' --git-upstream-tag=HEAD -us -uc -j' + jobs,
                 './debian/ci-upload.sh ' + distro + ' ' + debarch,
             ],

debian/dh-lib.patch

@@ -0,0 +1,32 @@
+diff --git a/lib/Debian/Debhelper/Dh_Lib.pm b/lib/Debian/Debhelper/Dh_Lib.pm
+index e25b696c0bbf61677344b99382c7a58a1182dc1a..9c829f0f0effb4094eb6ab5a6a60e662726f41fb 100644
+--- a/lib/Debian/Debhelper/Dh_Lib.pm
++++ b/lib/Debian/Debhelper/Dh_Lib.pm
+@@ -31,7 +31,7 @@ use constant {
+ 	'DBGSYM_PACKAGE_TYPE' => DEFAULT_PACKAGE_TYPE,
+ };
+ 
+-use Errno qw(ENOENT);
++use Errno qw(ENOENT EXDEV);
+ use Exporter qw(import);
+ use File::Glob qw(bsd_glob GLOB_CSH GLOB_NOMAGIC GLOB_TILDE);
+ our (@EXPORT, %dh);
+@@ -535,8 +535,16 @@ sub rename_path {
+ 	}
+ 	return 1 if $dh{NO_ACT};
+ 	if (not rename($source, $dest)) {
+-		my $files = escape_shell($source, $dest);
+-		error("mv $files: $!")
++		my $ok = 0;
++		if ($! == EXDEV) {
++			# Replay with a fork+exec to handle crossing two mount
++			# points (See #897569)
++			$ok = _doit('mv', $source, $dest);
++		}
++		if (not $ok) {
++			my $files = escape_shell($source, $dest);
++			error("mv $files: $!");
++		}
+ 	}
+ 	return 1;
+ }