diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b95389e279..2f9da38544 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -258,7 +258,7 @@ openSUSE 15.3 RPM Package:
   image: registry.gitlab.com/wireshark/wireshark-containers/opensuse-15.3-dev
   script:
     - printf "\e[0Ksection_start:%s:cmake_section[collapsed=true]\r\e[0KRunning CMake" "$( date +%s)"
-    - cmake -GNinja ..
+    - cmake -GNinja -DUSE_qt6=OFF ..
     - printf "\e[0Ksection_end:%s:cmake_section\r\e[0K" "$( date +%s)"
     - ninja wireshark_rpm
 openSUSE 15.3 RPM Test:
@@ -274,7 +274,7 @@ Rocky Linux 9 RPM Package:
   image: registry.gitlab.com/wireshark/wireshark-containers/rockylinux-9-dev
   script:
     - printf "\e[0Ksection_start:%s:cmake_section[collapsed=true]\r\e[0KRunning CMake" "$( date +%s)"
-    - cmake -GNinja ..
+    - cmake -GNinja -DUSE_qt6=OFF ..
     - printf "\e[0Ksection_end:%s:cmake_section\r\e[0K" "$( date +%s)"
     - ninja wireshark_rpm
 Rocky Linux 9 RPM Test:
@@ -448,7 +448,7 @@ Documentation:
     - mkdir build
     - cd build
     - printf "\e[0Ksection_start:%s:cmake_section[collapsed=true]\r\e[0KRunning CMake" "$( date +%s)"
-    - cmake -GNinja ..
+    - cmake -GNinja -DUSE_qt6=OFF ..
     - printf "\e[0Ksection_end:%s:cmake_section\r\e[0K" "$( date +%s)"
     - ninja all_guides
     - cd docbook
@@ -605,7 +605,7 @@ Coverity GCC Scan:
     - tar --directory=/tmp --extract --gzip --file /tmp/cov-analysis-linux64.tar.gz
     - mkdir build
     - cd build
-    - cmake -G Ninja ..
+    - cmake -G Ninja -DUSE_qt6=OFF ..
     - /tmp/cov-analysis-linux64-*/bin/cov-build --return-emit-failures --dir ../cov-int ninja
     - cd ..
     - tar --create --gzip --file cov-int.tar.gz cov-int
@@ -708,7 +708,7 @@ API Reference:
   rules: !reference [.if-daily-schedule]
   script:
     - printf "\e[0Ksection_start:%s:cmake_section[collapsed=true]\r\e[0KRunning CMake" "$( date +%s)"
-    - cmake -GNinja ..
+    - cmake -GNinja -DUSE_qt6=OFF ..
     - printf "\e[0Ksection_end:%s:cmake_section\r\e[0K" "$( date +%s)"
     - ninja wsar_html_zip 2>&1 > doxygen_output.txt | tee doxygen_errors.txt
   after_script:
@@ -746,7 +746,7 @@ Code Lines:
     - tar -xf tokei-x86_64-unknown-linux-gnu.tar.gz
     - popd
     - printf "\e[0Ksection_start:%s:cmake_section[collapsed=true]\r\e[0KRunning CMake" "$( date +%s)"
-    - cmake -G Ninja ..
+    - cmake -G Ninja -DUSE_qt6=OFF ..
     - printf "\e[0Ksection_end:%s:cmake_section\r\e[0K" "$( date +%s)"
     - ninja
     - cd ..
@@ -813,7 +813,7 @@ ASan Menagerie Fuzz:
   script:
     - MAX_SECONDS=$(( 4 * 60 * 60 ))
     - printf "\e[0Ksection_start:%s:cmake_section[collapsed=true]\r\e[0KRunning CMake" "$( date +%s)"
-    - cmake -G Ninja -DBUILD_wireshark=OFF -DCMAKE_BUILD_TYPE=Debug -DENABLE_ASAN=ON -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX -DENABLE_CCACHE=ON ..
+    - cmake -G Ninja -DBUILD_wireshark=OFF -DCMAKE_BUILD_TYPE=Debug -DENABLE_ASAN=ON -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX -DENABLE_CCACHE=ON -DUSE_qt6=OFF ..
     - printf "\e[0Ksection_end:%s:cmake_section\r\e[0K" "$( date +%s)"
     - ninja
     - ninja install
@@ -828,7 +828,7 @@ ASan randpkt Fuzz:
   script:
     # XXX Reuse fuzz-asan?
     - printf "\e[0Ksection_start:%s:cmake_section[collapsed=true]\r\e[0KRunning CMake" "$( date +%s)"
-    - cmake -G Ninja -DBUILD_wireshark=OFF -DCMAKE_BUILD_TYPE=Debug -DENABLE_ASAN=ON -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX -DENABLE_CCACHE=ON ..
+    - cmake -G Ninja -DBUILD_wireshark=OFF -DCMAKE_BUILD_TYPE=Debug -DENABLE_ASAN=ON -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX -DENABLE_CCACHE=ON -DUSE_qt6=OFF ..
     - printf "\e[0Ksection_end:%s:cmake_section\r\e[0K" "$( date +%s)"
     - ninja
     - ninja install
@@ -844,7 +844,7 @@ Valgrind Menagerie Fuzz:
     - DEBIAN_FRONTEND=noninteractive apt-get --yes install valgrind
     - MAX_SECONDS=$(( 3 * 60 * 60 ))
     - printf "\e[0Ksection_start:%s:cmake_section[collapsed=true]\r\e[0KRunning CMake" "$( date +%s)"
-    - cmake -G Ninja -DBUILD_wireshark=OFF -DCMAKE_BUILD_TYPE=Debug -DENABLE_ASAN=OFF -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX -DENABLE_CCACHE=ON ..
+    - cmake -G Ninja -DBUILD_wireshark=OFF -DCMAKE_BUILD_TYPE=Debug -DENABLE_ASAN=OFF -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX -DENABLE_CCACHE=ON -DUSE_qt6=OFF ..
     - printf "\e[0Ksection_end:%s:cmake_section\r\e[0K" "$( date +%s)"
     - ninja
     - ninja install