build eloquent snaps on OSX

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I am following the information provided on https://snapcraft.io/blog/how-to-buil... but my colcon compilation fails with

colcon build --merge-install --build-base /root/parts/colcon-part/build --base-paths /root/parts/colcon-part/src/demo_nodes_cpp --install-base /root/parts/colcon-part/install/opt/ros/snap --parallel-workers=2 --cmake-args -DCMAKE_BUILD_TYPE=Release
Starting >>> demo_nodes_cpp
--- stderr: demo_nodes_cpp
make[2]: *** No rule to make target '/usr/lib/x86_64-linux-gnu/libpcre.so', needed by 'listener'.  Stop.
make[2]: *** Waiting for unfinished jobs....
make[2]: *** No rule to make target '/usr/lib/x86_64-linux-gnu/libpcre.so', needed by 'listener_serialized_message'.  Stop.
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [CMakeFiles/listener.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [CMakeFiles/listener_serialized_message.dir/all] Error 2
make: *** [all] Error 2
---
Failed   <<< demo_nodes_cpp [ Exited with code 2 ]

Summary: 0 packages finished [5.30s]
  1 package failed: demo_nodes_cpp
  1 package had stderr output: demo_nodes_cpp
Failed to run 'colcon build --merge-install --build-base /root/parts/colcon-part/build --base-paths /root/parts/colcon-part/src/demo_nodes_cpp --install-base /root/parts/colcon-part/install/opt/ros/snap --parallel-workers=2 --cmake-args -DCMAKE_BUILD_TYPE=Release' for 'colcon-part': Exited with code 2.
Verify that the part is using the correct parameters and try again.
Run the same command again with --debug to shell into the environment if you wish to introspect this failure.
An error occurred when trying to execute 'sudo -i env SNAPCRAFT_HAS_TTY=True snapcraft snap' with 'multipass': returned exit code 2.

I am by no means familiar with Snaps and just wanted to get some pointers or insights on what's going on here or how to debug this further.

I've tried to debug this in an interactive shell with snapcraft --debug and I can verify that /usr/lib/x86_64-linux-gnu/libpcre.so does indeed exist.