diff --git a/arch-chroot.in b/arch-chroot.in
index 03efbc9..0868a2a 100644
--- a/arch-chroot.in
+++ b/arch-chroot.in
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-2.0-only
 
 shopt -s extglob
 
diff --git a/common b/common
index 0e5ab19..ced125b 100644
--- a/common
+++ b/common
@@ -1,4 +1,7 @@
+#!/hint/bash
+# SPDX-License-Identifier: GPL-2.0-only
 # shellcheck disable=SC2059 # $1 and $2 can contain the printf modifiers
+
 out() { printf "$1 $2\n" "${@:3}"; }
 error() { out "==> ERROR:" "$@"; } >&2
 warning() { out "==> WARNING:" "$@"; } >&2
diff --git a/fstab-helpers b/fstab-helpers
index 85c3c85..f8066f9 100644
--- a/fstab-helpers
+++ b/fstab-helpers
@@ -1,3 +1,6 @@
+#!/hint/bash
+# SPDX-License-Identifier: GPL-2.0-only
+
 # generated from util-linux source: libmount/src/utils.c
 declare -A pseudofs_types=([anon_inodefs]=1
                            [apparmorfs]=1
diff --git a/genfstab.in b/genfstab.in
index 0269374..6dc9d71 100644
--- a/genfstab.in
+++ b/genfstab.in
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-2.0-only
 
 shopt -s extglob
 
diff --git a/pacstrap.in b/pacstrap.in
index 0f88631..c993565 100644
--- a/pacstrap.in
+++ b/pacstrap.in
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-2.0-only
 
 #
 # Assumptions: