diff --git a/ciss_live_builder.sh b/ciss_live_builder.sh
index bc59554..4abfe38 100644
--- a/ciss_live_builder.sh
+++ b/ciss_live_builder.sh
@@ -216,7 +216,6 @@ lb_config_start
 if [[ "${VAR_SUITE}" == "bookworm" ]]; then
   lb_config_write
   rm -f "${SCRIPT_BASEPATH}/config/hooks/live/9998_sources_list_trixie.chroot"
-  rm -f "${SCRIPT_BASEPATH}/config/hooks/live/9998_sources_list_trixie.hook.binary"
 else
   lb_config_write_trixie
   rm -f "${SCRIPT_BASEPATH}/config/hooks/live/0003_install_backports.chroot"
diff --git a/config/hooks/live/9998_sources_list_trixie.chroot b/config/hooks/live/9998_sources_list_trixie.chroot
index 31eb0ec..f9437e0 100644
--- a/config/hooks/live/9998_sources_list_trixie.chroot
+++ b/config/hooks/live/9998_sources_list_trixie.chroot
@@ -16,6 +16,16 @@ printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "
 
 cd /root
 
+mkdir -p /etc/apt/apt.conf.d
+
+cat << EOF >| /etc/apt/apt.conf.d/00-deb822-prefer
+// Make APT ignore the classic /etc/apt/sources.list entirely.
+Dir::Etc {
+  sourcelist  "/dev/null";                // classic list is ignored
+  sourceparts "/etc/apt/sources.list.d";  // deb822 *.sources remain authoritative
+}
+EOF
+
 if [[ ! -f /etc/apt/sources.list.d/trixie.sources ]]; then
   cat << EOF >| /etc/apt/sources.list.d/trixie.sources
 # SPDX-Version: 3.0
diff --git a/config/hooks/live/9998_sources_list_trixie.hook.binary b/config/hooks/live/9998_sources_list_trixie.hook.binary
deleted file mode 100644
index e13ae80..0000000
--- a/config/hooks/live/9998_sources_list_trixie.hook.binary
+++ /dev/null
@@ -1,63 +0,0 @@
-#!/bin/bash
-# SPDX-Version: 3.0
-# SPDX-CreationInfo: 2025-08-12; WEIDNER, Marc S.; <msw@coresecret.dev>
-# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
-# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
-# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
-# SPDX-FileType: SOURCE
-# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
-# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
-# SPDX-PackageName: CISS.debian.live.builder
-# SPDX-Security-Contact: security@coresecret.eu
-set -C -e -u -o pipefail
-
-printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
-
-if [[ -f "${VAR_HANDLER_BUILD_DIR}/chroot/etc/apt/sources.list" ]]; then
-
-  cat << EOF >| ${VAR_HANDLER_BUILD_DIR}/chroot/etc/apt/sources.list"
-# SPDX-Version: 3.0
-# SPDX-CreationInfo: 2025-08-12; WEIDNER, Marc S.; <msw@coresecret.dev>
-# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
-# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
-# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
-# SPDX-FileType: SOURCE
-# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
-# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
-# SPDX-PackageName: CISS.debian.live.builder
-# SPDX-Security-Contact: security@coresecret.eu
-
-# File: /etc/apt/sources.list
-# Intentionally empty, disable classic sources.list generation (deb822 in use).
-
-# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf
-
-EOF
-
-else
-
-  cat << EOF >| ${VAR_HANDLER_BUILD_DIR}/chroot/etc/apt/sources.list"
-# SPDX-Version: 3.0
-# SPDX-CreationInfo: 2025-08-12; WEIDNER, Marc S.; <msw@coresecret.dev>
-# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
-# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
-# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
-# SPDX-FileType: SOURCE
-# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
-# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
-# SPDX-PackageName: CISS.debian.live.builder
-# SPDX-Security-Contact: security@coresecret.eu
-
-# File: /etc/apt/sources.list
-# Intentionally empty, disable classic sources.list generation (deb822 in use).
-
-# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf
-
-EOF
-
-fi
-
-printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
-
-exit 0
-# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
diff --git a/lib/lib_check_hooks.sh b/lib/lib_check_hooks.sh
index 222fa8d..199befe 100644
--- a/lib/lib_check_hooks.sh
+++ b/lib/lib_check_hooks.sh
@@ -25,7 +25,6 @@ check_hooks() {
   ifs=$'\n\t'
   shopt -s nullglob
   declare -a files=("${VAR_WORKDIR}"/config/hooks/live/*.chroot)
-  files+=("${VAR_WORKDIR}"/config/hooks/live/*.hook.binary)
 
   if (( ${#files[@]} == 0 )); then
     printf "\e[91m❌ No '*.chroot' files found in '%s/config/hooks/live'. \e[0m\n" "${VAR_WORKDIR}" >&2