diff --git a/CHANGELOG.md b/CHANGELOG.md
index ec0af102..de7e8240 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ All notable changes to this project will be documented in this file. The format
 - **Internal:**
   - `ENABLE_QUOTAS=1` - When an alias has multiple addresses, the first local mailbox address found will be used for the Dovecot dummy account workaround ([#4581](https://github.com/docker-mailserver/docker-mailserver/pull/4581))
   - Change Detection service - Added support for responding to updated DMS config (_Rspamd and TLS certificates_) to `ACCOUNT_PROVISIONER=LDAP` ([#4627](https://github.com/docker-mailserver/docker-mailserver/pull/4627))
+  - The `Dockerfile` has changed the source of `dovecot-fts-xapian` package from the [upstream Github repo source](https://github.com/grosjo/fts-xapian) (_which is presently unaccessible_) to instead use the [Debian package source files](https://deb.debian.org/debian/pool/main/d/dovecot-fts-xapian/) (#4700)
 - **Tests:**
   - Make the helper method `_get_container_ip()` compatible with Docker 29 ([#4606](https://github.com/docker-mailserver/docker-mailserver/pull/4606))
 
diff --git a/Dockerfile b/Dockerfile
index e2f7fc0d..cbbb77f2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,11 +34,10 @@ RUN /bin/bash /build/packages.sh && rm -r /build
 # --- Compile deb packages ----------------------
 # -----------------------------------------------
 
+# When absolutely necessary DMS carries support to compile `.deb` packages of software:
+# - `dovecot-fts-xapian` for compatibility with the Dovecot CE `dovecot-core` package:
+#   https://github.com/docker-mailserver/docker-mailserver/pull/3373
 FROM stage-base AS stage-compile
-
-ARG LOG_LEVEL
-ARG DEBIAN_FRONTEND
-
 COPY target/scripts/build/compile.sh /build/
 RUN /bin/bash /build/compile.sh
 
@@ -47,13 +46,8 @@ RUN /bin/bash /build/compile.sh
 #
 
 FROM stage-base AS stage-main
-
-ARG DEBIAN_FRONTEND
-ARG LOG_LEVEL
-
 SHELL ["/bin/bash", "-e", "-o", "pipefail", "-c"]
 
-
 # -----------------------------------------------
 # --- ClamAV & FeshClam -------------------------
 # -----------------------------------------------
@@ -80,10 +74,9 @@ EOF
 # --- Dovecot -----------------------------------
 # -----------------------------------------------
 
-# install fts_xapian plugin
-
-COPY --from=stage-compile dovecot-fts-xapian-*.deb /
-RUN dpkg -i /dovecot-fts-xapian-*.deb && rm /dovecot-fts-xapian-*.deb
+# Install compiled `dovecot-fts-xapian` package:
+RUN --mount=type=bind,from=stage-compile,target=/mnt/stage-compile/ \
+  dpkg -i /mnt/stage-compile/dovecot-fts-xapian_*.deb
 
 COPY target/dovecot/*.inc target/dovecot/*.conf /etc/dovecot/conf.d/
 COPY target/dovecot/dovecot-purge.cron /etc/cron.d/dovecot-purge.disabled
diff --git a/target/scripts/build/compile.sh b/target/scripts/build/compile.sh
index 21a7869e..0be9cf1e 100644
--- a/target/scripts/build/compile.sh
+++ b/target/scripts/build/compile.sh
@@ -18,26 +18,16 @@ function _install_build_deps() {
 }
 
 function _build_package() {
-  local XAPIAN_VERSION='1.9.1'
-  curl -fsSL "https://github.com/grosjo/fts-xapian/releases/download/${XAPIAN_VERSION}/dovecot-fts-xapian-${XAPIAN_VERSION}.tar.gz" \
+  local XAPIAN_DEBIAN_VERSION='1.9.1-1~bpo12+1'
+  local XAPIAN_VERSION="${XAPIAN_DEBIAN_VERSION%-*}"
+  curl -fsSL "https://deb.debian.org/debian/pool/main/d/dovecot-fts-xapian/dovecot-fts-xapian_${XAPIAN_VERSION}.orig.tar.gz" \
     | tar -xz
   cd "fts-xapian-${XAPIAN_VERSION}"
 
   # Prepare for building DEB source package:
-  # https://manpages.debian.org/bookworm/dh-make/dh_make.1.en.html
-  # License LGPL 2.1: https://github.com/grosjo/fts-xapian/issues/174#issuecomment-2422404568
-  USER=root dh_make --packagename "dovecot-fts-xapian-${XAPIAN_VERSION}" --single --native --copyright lgpl2 -y
-  # Remove generated example files:
-  rm debian/*.ex
   # Add required package metadata:
   # https://www.debian.org/doc/manuals/maint-guide/dreq.en.html#control
-  curl -fsSL https://raw.githubusercontent.com/grosjo/fts-xapian/refs/tags/1.7.16/PACKAGES/DEB/control > debian/control
-  # Replace version number:
-  sed -i -E "s|(dovecot-fts-xapian)-[1-9\.-]+|\1-${XAPIAN_VERSION}|g" debian/control
-  # Required to proceed with debuild:
-  # https://www.debian.org/doc/manuals/maint-guide/dother.en.html#compat
-  # (13 is the default debhelper version from the original `dh_make` generated `debian/control`):
-  echo '13' > debian/compat
+  curl -fsSL "https://deb.debian.org/debian/pool/main/d/dovecot-fts-xapian/dovecot-fts-xapian_${XAPIAN_DEBIAN_VERSION}.debian.tar.xz" | tar -xJ
 
   # Build arch specific binary package via debuild:
   # https://manpages.debian.org/bookworm/devscripts/debuild.1.en.html