diff --git a/scripts/wsrep_sst_mariabackup.sh b/scripts/wsrep_sst_mariabackup.sh
index aa9442b0601..471b0e5f5b0 100644
--- a/scripts/wsrep_sst_mariabackup.sh
+++ b/scripts/wsrep_sst_mariabackup.sh
@@ -1,4 +1,7 @@
-#!/bin/bash -ue
+#!/usr/bin/env bash
+
+set -ue
+
 # Copyright (C) 2017-2021 MariaDB
 # Copyright (C) 2013 Percona Inc
 #
diff --git a/scripts/wsrep_sst_mysqldump.sh b/scripts/wsrep_sst_mysqldump.sh
index bed2cac0a9a..1c8fc181328 100644
--- a/scripts/wsrep_sst_mysqldump.sh
+++ b/scripts/wsrep_sst_mysqldump.sh
@@ -1,4 +1,7 @@
-#!/bin/bash -ue
+#!/usr/bin/env bash
+
+set -ue
+
 # Copyright (C) 2009-2015 Codership Oy
 # Copyright (C) 2017-2021 MariaDB
 #
diff --git a/scripts/wsrep_sst_rsync.sh b/scripts/wsrep_sst_rsync.sh
index 28dfed18218..cc73db5da87 100644
--- a/scripts/wsrep_sst_rsync.sh
+++ b/scripts/wsrep_sst_rsync.sh
@@ -1,4 +1,6 @@
-#!/bin/bash -ue
+#!/usr/bin/env bash
+
+set -ue
 
 # Copyright (C) 2017-2021 MariaDB
 # Copyright (C) 2010-2014 Codership Oy
@@ -740,7 +742,7 @@ EOF
             elif [ "$OS" = 'Linux' ]; then
                tmpfile=$(mktemp "--tmpdir=$tmpdir")
             else
-               tmpfile=$(TMPDIR="$tmpdir"; mktemp '-d')
+               tmpfile=$(TMPDIR="$tmpdir"; mktemp)
             fi
 
             wsrep_log_info "Extracting binlog files:"