diff --git a/extract-files.sh b/extract-files.sh
index f77de57..e8d0540 100755
--- a/extract-files.sh
+++ b/extract-files.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 #
-# Copyright (C) 2020 The LineageOS Project
-#
+# SPDX-FileCopyrightText: 2016 The CyanogenMod Project
+# SPDX-FileCopyrightText: 2017-2024 The LineageOS Project
 # SPDX-License-Identifier: Apache-2.0
 #
 
@@ -9,15 +9,27 @@ function blob_fixup() {
     case "${1}" in
         vendor/etc/camera/pureShot_parameter.xml \
         |vendor/etc/camera/pureView_parameter.xml)
+            [ "$2" = "" ] && return 0
             sed -i 's/=\([0-9]\+\)>/="\1">/g' "${2}"
             ;;
         vendor/lib64/hw/camera.qcom.so)
+            [ "$2" = "" ] && return 0
             sed -i "s/\x73\x74\x5F\x6C\x69\x63\x65\x6E\x73\x65\x2E\x6C\x69\x63/\x63\x61\x6D\x65\x72\x61\x5F\x63\x6E\x66\x2E\x74\x78\x74/g" "${2}"
             ;;
         vendor/lib64/hw/camera.xiaomi.so)
+            [ "$2" = "" ] && return 0
             "${SIGSCAN}" -p "29 07 00 94" -P "1F 20 03 D5" -f "${2}"
             ;;
+        *)
+            return 1
+            ;;
     esac
+
+    return 0
+}
+
+function blob_fixup_dry() {
+    blob_fixup "$1" ""
 }
 
 # If we're being sourced by the common script that we called,
@@ -28,9 +40,9 @@ fi
 
 set -e
 
-# Required!
 export DEVICE=lisa
 export DEVICE_COMMON=sm8350-common
 export VENDOR=xiaomi
+export VENDOR_COMMON=${VENDOR}
 
-"./../../${VENDOR}/${DEVICE_COMMON}/extract-files.sh" "$@"
+"./../../${VENDOR_COMMON}/${DEVICE_COMMON}/extract-files.sh" "$@"
diff --git a/setup-makefiles.sh b/setup-makefiles.sh
index c3af1f7..f777e33 100755
--- a/setup-makefiles.sh
+++ b/setup-makefiles.sh
@@ -1,15 +1,21 @@
 #!/bin/bash
 #
-# Copyright (C) 2020 The LineageOS Project
-#
+# SPDX-FileCopyrightText: 2016 The CyanogenMod Project
+# SPDX-FileCopyrightText: 2017-2024 The LineageOS Project
 # SPDX-License-Identifier: Apache-2.0
 #
 
+# If we're being sourced by the common script that we called,
+# stop right here. No need to go down the rabbit hole.
+if [ "${BASH_SOURCE[0]}" != "${0}" ]; then
+    return
+fi
+
 set -e
 
-# Required!
 export DEVICE=lisa
 export DEVICE_COMMON=sm8350-common
 export VENDOR=xiaomi
+export VENDOR_COMMON=${VENDOR}
 
-"./../../${VENDOR}/${DEVICE_COMMON}/setup-makefiles.sh" "$@"
+"./../../${VENDOR_COMMON}/${DEVICE_COMMON}/setup-makefiles.sh" "$@"