diff --git a/docker/build_in_rocky9.sh b/docker/build_in_rocky9.sh
index 921f285d..71aa71b0 100755
--- a/docker/build_in_rocky9.sh
+++ b/docker/build_in_rocky9.sh
@@ -28,8 +28,13 @@ docker run --rm \
     "$IMG" bash -lc '
         set -eux
         git config --global --add safe.directory /workspace || true
+        # If this image predates the CMAKE_PREFIX_PATH fix, point cmake at the static libdbus config
+        # dir so the viewer (Qt6::DBus -> find_package(DBus1)) resolves WrapDBus1. Harmless once the
+        # image ENV already carries it.
+        dbus_dir=$(ls -d /opt/dbus-*-static/lib/cmake/DBus1 2>/dev/null | head -1)
         cmake -G Ninja -S /workspace -B /tmp/build \
             -DJFJOCH_VIEWER_ONLY=ON -DJFJOCH_USE_CUDA=ON \
+            ${dbus_dir:+-DDBus1_DIR=$dbus_dir} \
             -DCMAKE_BUILD_TYPE=Release \
             -DCMAKE_CXX_FLAGS="-march=x86-64-v3" -DCMAKE_C_FLAGS="-march=x86-64-v3"
         ninja -C /tmp/build -j"$(nproc)" jfjoch_viewer
diff --git a/docker/rocky8/Dockerfile b/docker/rocky8/Dockerfile
index 357d031f..f3db6b7f 100644
--- a/docker/rocky8/Dockerfile
+++ b/docker/rocky8/Dockerfile
@@ -168,8 +168,10 @@ RUN set -eux; \
     cmake --install eigen-build; \
     cd /; rm -rf /tmp/eigen /tmp/eigen-build
 
-# Make Qt and Eigen discoverable by CMake
-ENV CMAKE_PREFIX_PATH=/opt/qt-${QT_VERSION}-static:/opt/eigen-3.4
+# Make Qt, the static libdbus, and Eigen discoverable by CMake. The static libdbus prefix is
+# required here (not only at Qt build time): every Qt6::DBus consumer re-runs find_package(DBus1)
+# through Qt's exported config, so DBus1Config.cmake must be on CMAKE_PREFIX_PATH for the viewer build.
+ENV CMAKE_PREFIX_PATH=/opt/qt-${QT_VERSION}-static:/opt/dbus-${DBUS_VERSION}-static:/opt/eigen-3.4
 
 # Set workdir for your project
 WORKDIR /workspace
diff --git a/docker/rocky9/Dockerfile b/docker/rocky9/Dockerfile
index f5328bff..57a513f8 100644
--- a/docker/rocky9/Dockerfile
+++ b/docker/rocky9/Dockerfile
@@ -207,8 +207,10 @@ RUN set -eux; \
     cmake --install eigen-build; \
     cd /; rm -rf /tmp/eigen /tmp/eigen-build
 
-# Make Qt and Eigen discoverable by CMake
-ENV CMAKE_PREFIX_PATH=/opt/qt-${QT_VERSION}-static:/opt/eigen-3.4
+# Make Qt, the static libdbus, and Eigen discoverable by CMake. The static libdbus prefix is
+# required here (not only at Qt build time): every Qt6::DBus consumer re-runs find_package(DBus1)
+# through Qt's exported config, so DBus1Config.cmake must be on CMAKE_PREFIX_PATH for the viewer build.
+ENV CMAKE_PREFIX_PATH=/opt/qt-${QT_VERSION}-static:/opt/dbus-${DBUS_VERSION}-static:/opt/eigen-3.4
 
 ENV LANG=en_US.UTF-8
 ENV LANGUAGE=en_US:en
diff --git a/docker/ubuntu2204/Dockerfile b/docker/ubuntu2204/Dockerfile
index 7fcadefd..56588301 100644
--- a/docker/ubuntu2204/Dockerfile
+++ b/docker/ubuntu2204/Dockerfile
@@ -196,8 +196,10 @@ RUN set -eux; \
     cmake --install eigen-build; \
     cd /; rm -rf /tmp/eigen /tmp/eigen-build
 
-# Make Qt and Eigen discoverable by CMake
-ENV CMAKE_PREFIX_PATH=/opt/qt-${QT_VERSION}-static:/opt/eigen-3.4
+# Make Qt, the static libdbus, and Eigen discoverable by CMake. The static libdbus prefix is
+# required here (not only at Qt build time): every Qt6::DBus consumer re-runs find_package(DBus1)
+# through Qt's exported config, so DBus1Config.cmake must be on CMAKE_PREFIX_PATH for the viewer build.
+ENV CMAKE_PREFIX_PATH=/opt/qt-${QT_VERSION}-static:/opt/dbus-${DBUS_VERSION}-static:/opt/eigen-3.4
 
 # Set workdir for your project
 WORKDIR /workspace
diff --git a/docker/ubuntu2404/Dockerfile b/docker/ubuntu2404/Dockerfile
index f0b649e7..ca9678c7 100644
--- a/docker/ubuntu2404/Dockerfile
+++ b/docker/ubuntu2404/Dockerfile
@@ -183,8 +183,10 @@ RUN set -eux; \
     cmake --install eigen-build; \
     cd /; rm -rf /tmp/eigen /tmp/eigen-build
 
-# Make Qt and Eigen discoverable by CMake
-ENV CMAKE_PREFIX_PATH=/opt/qt-${QT_VERSION}-static:/opt/eigen-3.4
+# Make Qt, the static libdbus, and Eigen discoverable by CMake. The static libdbus prefix is
+# required here (not only at Qt build time): every Qt6::DBus consumer re-runs find_package(DBus1)
+# through Qt's exported config, so DBus1Config.cmake must be on CMAKE_PREFIX_PATH for the viewer build.
+ENV CMAKE_PREFIX_PATH=/opt/qt-${QT_VERSION}-static:/opt/dbus-${DBUS_VERSION}-static:/opt/eigen-3.4
 
 # Set workdir for your project
 WORKDIR /workspace