Application error with --setting flags that accept boolean values

[theAJFM]

Hi,
I ran into 500 errors when visiting the pages of my vercel deployment, and it only happened every time I deploy the app with --setting flags that accept boolean in it (e.g. allow_download, allow_facet).

Here's the command that I used to deploy my app:

datasette publish vercel database.db --project=blah-blah --install=datasette-vega --setting allow_download off

And here's the error that I observed in vercel's logs:

module initialization error: name 'false' is not defined
module initialization error
name 'false' is not defined

If I may take an educated guess, the error is caused by the use of json.dumps on the settings dictionary here.

I can confirm that the generated source code in the vercel has the lowercase false boolean set as the value of the dictionary. It was neither a "false" string nor python's False boolean, whichever it is you meant to set.