diff --git a/builder/package.centos-6 b/builder/package.centos-6
index 8a7a36f..beb371b 100644
--- a/builder/package.centos-6
+++ b/builder/package.centos-6
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 if [[ ! -d /tmp/output/centos-6 ]]; then
   mkdir -p /tmp/output/centos-6
 fi
diff --git a/builder/package.centos-7 b/builder/package.centos-7
index 76b2ee2..e35430d 100644
--- a/builder/package.centos-7
+++ b/builder/package.centos-7
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 if [[ ! -d /tmp/output/centos-7 ]]; then
   mkdir -p /tmp/output/centos-7
 fi
diff --git a/builder/package.debian-9 b/builder/package.debian-9
index 6780327..620dd48 100644
--- a/builder/package.debian-9
+++ b/builder/package.debian-9
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 if [[ ! -d /tmp/output/debian-9 ]]; then
   mkdir -p /tmp/output/debian-9
 fi
diff --git a/builder/package.opensuse-15 b/builder/package.opensuse-15
index 58e14ff..83a3ecf 100644
--- a/builder/package.opensuse-15
+++ b/builder/package.opensuse-15
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 if [[ ! -d /tmp/output/opensuse-15 ]]; then
   mkdir -p /tmp/output/opensuse-15
 fi
diff --git a/builder/package.opensuse-42 b/builder/package.opensuse-42
index 4cc1837..714b8bb 100644
--- a/builder/package.opensuse-42
+++ b/builder/package.opensuse-42
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 if [[ ! -d /tmp/output/opensuse-42 ]]; then
   mkdir -p /tmp/output/opensuse-42
 fi
diff --git a/builder/package.ubuntu-1604 b/builder/package.ubuntu-1604
index 33aa081..fc5b187 100644
--- a/builder/package.ubuntu-1604
+++ b/builder/package.ubuntu-1604
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 if [[ ! -d /tmp/output/ubuntu-1604 ]]; then
   mkdir -p /tmp/output/ubuntu-1604
 fi
diff --git a/builder/package.ubuntu-1804 b/builder/package.ubuntu-1804
index 2b3f7c4..a1ac4de 100644
--- a/builder/package.ubuntu-1804
+++ b/builder/package.ubuntu-1804
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 if [[ ! -d /tmp/output/ubuntu-1804 ]]; then
   mkdir -p /tmp/output/ubuntu-1804
 fi