bug#45453: Error when I try to build a package using a JSON definition

[Ryan Prior]

Hi guix! Today I wrote a package in Guile and then decided to try and
reproduce the same thing using JSON, but I hit a snag. I'm attaching
the package definition in its Guile and JSON forms, along with the error
I get when I try to build the package using `guix build -f countdown.json'.

Any idea what the issue here is or how I should go about debugging?

Thank you!
Ryan

countdown.scm
Description: Binary data

countdown.json
Description: application/json

countdown-build.out.txt
Description: Text document