diff --git a/dev-perl/module_build/module_build-0.4234.recipe b/dev-perl/module_build/module_build-0.4234.recipe
index f186144e4..bc1b8d524 100644
--- a/dev-perl/module_build/module_build-0.4234.recipe
+++ b/dev-perl/module_build/module_build-0.4234.recipe
@@ -8,7 +8,7 @@ very cross-platform way."
 HOMEPAGE="https://metacpan.org/pod/distribution/Module-Build/lib/Module/Build.pm"
 COPYRIGHT="2001-2006 Ken Williams"
 LICENSE="Artistic"
-REVISION="3"
+REVISION="4"
 SOURCE_URI="https://cpan.metacpan.org/authors/id/L/LE/LEONT/Module-Build-$portVersion.tar.gz"
 CHECKSUM_SHA256="66aeac6127418be5e471ead3744648c766bd01482825c5b66652675f2bc86a8f"
 SOURCE_DIR="Module-Build-$portVersion"
@@ -34,6 +34,8 @@ BUILD_PREREQUIRES="
 
 BUILD()
 {
+	# We do patch Module::Build to install into vendor directories by default in HaikuPorter, but
+	# this Build.PL script overrides it for historical reasons, so specify it manually still.
 	perl Build.PL --installdirs vendor --prefix $prefix
 	./Build
 }
@@ -50,5 +52,8 @@ INSTALL()
 
 TEST()
 {
+	unset HAIKU_USE_VENDOR_DIRECTORIES
+		# tests assume installation in site directories by default
+
 	./Build test
 }
diff --git a/dev-perl/module_build/patches/module_build-0.4234.patchset b/dev-perl/module_build/patches/module_build-0.4234.patchset
index 6b687ad18..3c8f3ca74 100644
--- a/dev-perl/module_build/patches/module_build-0.4234.patchset
+++ b/dev-perl/module_build/patches/module_build-0.4234.patchset
@@ -1,4 +1,4 @@
-From b397d50d5f0b67cf25d555a9407963ee04173322 Mon Sep 17 00:00:00 2001
+From 18db2ea3c12b6fa184a6f21a2cd41fff85ff07cf Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Joachim=20Mairb=C3=B6ck?= <j.mairboeck@gmail.com>
 Date: Sun, 4 Aug 2024 21:07:10 +0200
 Subject: hack to support naked 'perl' as the perl interpreter path
@@ -34,7 +34,7 @@ index 10b653f..0ee2515 100644
 2.45.2
 
 
-From 0b4e07616333ae4643d1a93606c2b201687a0845 Mon Sep 17 00:00:00 2001
+From a5bd63049b78b8f596b4a35825b5a92846c0c583 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Joachim=20Mairb=C3=B6ck?= <j.mairboeck@gmail.com>
 Date: Sun, 5 Jan 2025 14:45:19 +0100
 Subject: fix tests
@@ -57,3 +57,26 @@ index 2aeda20..3620523 100644
 -- 
 2.45.2
 
+
+From 8cc76665e751cdc799b6be2d67f264e3fda9b391 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Joachim=20Mairb=C3=B6ck?= <j.mairboeck@gmail.com>
+Date: Sun, 9 Feb 2025 15:35:30 +0100
+Subject: Add support for HAIKU_USE_VENDOR_DIRECTORIES
+
+
+diff --git a/lib/Module/Build/Base.pm b/lib/Module/Build/Base.pm
+index 0ee2515..170137d 100644
+--- a/lib/Module/Build/Base.pm
++++ b/lib/Module/Build/Base.pm
+@@ -917,7 +917,7 @@ __PACKAGE__->add_property(pureperl_only => 0);
+ __PACKAGE__->add_property(allow_pureperl => 0);
+ __PACKAGE__->add_property(
+   'installdirs',
+-  default => 'site',
++  default => $ENV{'HAIKU_USE_VENDOR_DIRECTORIES'} ? 'vendor' : 'site',
+   check   => sub {
+     return 1 if /^(core|site|vendor)$/;
+     return shift->property_error(
+-- 
+2.45.2
+