diff --git a/builder/image-ros.sh b/builder/image-ros.sh
index e56bc43c..17cf3be9 100755
--- a/builder/image-ros.sh
+++ b/builder/image-ros.sh
@@ -133,6 +133,9 @@ my_travis_retry apt-get install -y --no-install-recommends \
     ros-${ROS_DISTRO}-ws281x \
     ros-${ROS_DISTRO}-rosshow
 
+echo_stamp "Installing libboost-dev" # https://travis-ci.org/github/CopterExpress/clover/jobs/766318908#L6536
+my_travis_retry apt-get install -y --no-install-recommends libboost-dev
+
 # TODO move GeographicLib datasets to Mavros debian package
 echo_stamp "Install GeographicLib datasets (needed for mavros)" \
 && wget -qO- https://raw.githubusercontent.com/mavlink/mavros/master/mavros/scripts/install_geographiclib_datasets.sh | bash
diff --git a/clover/CMakeLists.txt b/clover/CMakeLists.txt
index 9b717d68..5cde1ffb 100644
--- a/clover/CMakeLists.txt
+++ b/clover/CMakeLists.txt
@@ -44,10 +44,6 @@ find_package(OpenCV ${_opencv_version} REQUIRED
     imgproc
 )
 
-# Fix https://travis-ci.org/github/CopterExpress/clover/jobs/766318908#L6536
-set(THREADS_PREFER_PTHREAD_FLAG ON)
-find_package(Threads REQUIRED)
-
 ## System dependencies are found with CMake's conventions
 # find_package(Boost REQUIRED COMPONENTS system)