rosdep install "given path 'src' does not exist"

[RoboDoc]

Revisiting OSR to do a clean install of latest code for Foxy/ROS2:
Following from https://github.com/nasa-jpl/osr-rover-code/blob/foxy-devel/setup/rpi.md
All went well until part 4.2 Clone and build the rover code
at step
rosdep install --from-paths src --ignore-src --rosdistro=foxy
I get error
given path 'src' does not exist
Don't see solution in Issues, Pull requests, nor Google
JHP

[RoboDoc]

Thanks to @Achllle on Slack:
need a
cd ~/osr_ws
command to get to the right directory prior to
rosdep install --from-paths src --ignore-src --rosdistro=foxy
after which you should get
#All required rosdeps installed successfully
JHP