diff --git a/dev-util/meson/meson-0.48.2.ebuild b/dev-util/meson/meson-0.48.2.ebuild
index 60e9ecb49c6c2..34aac8dda68b4 100644
--- a/dev-util/meson/meson-0.48.2.ebuild
+++ b/dev-util/meson/meson-0.48.2.ebuild
@@ -24,6 +24,14 @@ IUSE=""
 DEPEND="dev-python/setuptools[${PYTHON_USEDEP}]"
 RDEPEND="${DEPEND}"
 
+python_prepare_all() {
+	# ASAN and sandbox both want control over LD_PRELOAD
+	# https://bugs.gentoo.org/673016
+	sed -i -e 's/test_generate_gir_with_address_sanitizer/_&/' run_unittests.py || die
+
+	distutils-r1_python_prepare_all
+}
+
 python_test() {
 	(
 		# test_meson_installed
@@ -32,11 +40,6 @@ python_test() {
 		# test_cross_file_system_paths
 		unset XDG_DATA_HOME
 
-		# ASAN and sandbox both want to control LDPRELOAD
-		# https://bugs.gentoo.org/673016
-		export SANDBOX_ON=0
-		unset LD_PRELOAD
-
 		${EPYTHON} -u run_tests.py
 	) || die "Testing failed with ${EPYTHON}"
 }
diff --git a/dev-util/meson/meson-0.49.0.ebuild b/dev-util/meson/meson-0.49.0.ebuild
index aa2b296613ec7..9605fa9af90cb 100644
--- a/dev-util/meson/meson-0.49.0.ebuild
+++ b/dev-util/meson/meson-0.49.0.ebuild
@@ -24,6 +24,14 @@ IUSE=""
 DEPEND="dev-python/setuptools[${PYTHON_USEDEP}]"
 RDEPEND="${DEPEND}"
 
+python_prepare_all() {
+	# ASAN and sandbox both want control over LD_PRELOAD
+	# https://bugs.gentoo.org/673016
+	sed -i -e 's/test_generate_gir_with_address_sanitizer/_&/' run_unittests.py || die
+
+	distutils-r1_python_prepare_all
+}
+
 python_test() {
 	(
 		# test_meson_installed
@@ -32,11 +40,6 @@ python_test() {
 		# test_cross_file_system_paths
 		unset XDG_DATA_HOME
 
-		# ASAN and sandbox both want to control LDPRELOAD
-		# https://bugs.gentoo.org/673016
-		export SANDBOX_ON=0
-		unset LD_PRELOAD
-
 		${EPYTHON} -u run_tests.py
 	) || die "Testing failed with ${EPYTHON}"
 }
diff --git a/dev-util/meson/meson-9999.ebuild b/dev-util/meson/meson-9999.ebuild
index aa2b296613ec7..9605fa9af90cb 100644
--- a/dev-util/meson/meson-9999.ebuild
+++ b/dev-util/meson/meson-9999.ebuild
@@ -24,6 +24,14 @@ IUSE=""
 DEPEND="dev-python/setuptools[${PYTHON_USEDEP}]"
 RDEPEND="${DEPEND}"
 
+python_prepare_all() {
+	# ASAN and sandbox both want control over LD_PRELOAD
+	# https://bugs.gentoo.org/673016
+	sed -i -e 's/test_generate_gir_with_address_sanitizer/_&/' run_unittests.py || die
+
+	distutils-r1_python_prepare_all
+}
+
 python_test() {
 	(
 		# test_meson_installed
@@ -32,11 +40,6 @@ python_test() {
 		# test_cross_file_system_paths
 		unset XDG_DATA_HOME
 
-		# ASAN and sandbox both want to control LDPRELOAD
-		# https://bugs.gentoo.org/673016
-		export SANDBOX_ON=0
-		unset LD_PRELOAD
-
 		${EPYTHON} -u run_tests.py
 	) || die "Testing failed with ${EPYTHON}"
 }