Cannot find closure

[AlanMThomason]

I'm having trouble with the build.py step in the build process described here...

https://github.com/carlosperate/ardublockly/wiki/Building-Ardublockly

When I run build.py, I receive the following message...
Error: Closure not found. Read this:
https://developers.google.com/blockly/hacking/closure

The build.py file is looking for

('path = ', '..\closure-library\closure\bin')
('filename = ', 'calcdeps.py')

Which does not exist in the closure library that I downloaded (20210601). I see that most of the activity on this project was from 2016, was this file deleted in later version of the closure library or is there a step that I missed to create this file?

[AlanMThomason]

I was not properly following the instructions.
git submodule update --init --recursive
in the build instructions
https://github.com/carlosperate/ardublockly/wiki/Building-Ardublockly
pulls in the needed files.