I am customizing the git-minimal package, and for some reason python is
getting rebuilt from source, and I'm not able to figure out why.

I can recursively list/graph runtime dependencies (references) of a
store item using the following commands.

guix size /gnu/store/...
guix graph -t references /gnu/store/...

How do I list the build dependencies (inputs of the build derivation) of
a store item?

Thanks,
Arun.