rosdep freezes after unpacking / looking for packages in path

[julled]

I try to do crosscompile ros noetic with some additional packages for a raspberry pi.

The following script is ran with sudo (is this a problem?) but it freezes after unpacking / looking for packages in the given path.
The interesting thing is that if i run the script twice, it continues without freezing.
Does anybody know what might be the reason?

SCRIPT

export ROS_DISTRO="noetic"
export ROS_OS_OVERRIDE=debian:buster
export ROS_PYTHON_VERSION="3"
export ROS_LANG_DISABLE="geneus:genlisp:gennodejs"
sh -c 'echo "deb http://packages.ros.org/ros/ubuntu buster main" > /etc/apt/sources.list.d/ros-latest.list'
apt-key adv --keyserver 'hkp://keyserver.ubuntu.com:80' --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654
apt-get update
apt-get install -y build-essential tmux cmake git
apt-get install -y python3-rosdep python3-rosinstall-generator python3-vcstool python3-empy python3-catkin-tools python3-osrf-pycommon python3-pip
apt-get install -y ca-certificates
rosdep init
rosdep update
rosdep fix-permissions
rosinstall_generator --rosdistro noetic --deps --tar \
  geometry \
  sensor_msgs \
  image_common \
  vision_opencv \
  image_transport \
  image_transport_plugins \
  image_pipeline \
  image_geometry \
  vision_msgs \
  compressed_image_transport \
  image_proc \
  mavros \
  mavros_extras |
  tee noetic.rosinstall

mkdir ./src

vcs import --input noetic.rosinstall ./src
ROS_OS_OVERRIDE=debian:buster rosdep install --from-paths ./src --rosdistro noetic -y --ignore-src --os=debian:buster -v

OUTPUT

..........................................................................................................
=== ./src/actionlib/actionlib (tar) ===
Downloaded tarball from 'https://github.com/ros-gbp/actionlib-release/archive/release/noetic/actionlib/1.14.0-1.tar.gz' and unpacked it
....
== ./src/vision_opencv/image_geometry (tar) ===
Downloaded tarball from 'https://github.com/ros-gbp/vision_opencv-release/archive/release/noetic/image_geometry/1.16.2-1.tar.gz' and unpacked it
=== ./src/vision_opencv/vision_opencv (tar) ===
Downloaded tarball from 'https://github.com/ros-gbp/vision_opencv-release/archive/release/noetic/vision_opencv/1.16.2-1.tar.gz' and unpacked it
Using argument './src' as a path to search.
Looking for packages in '/src'...