CLI not fully installing/configuring project?

[jason-roundtree]

I've been trying to setup a project for the 100DaysOfGatsby challenge and when I run npm init gatsby or gatsby new it takes me through the setup and creates a project for me but it seems like it's not installing and configuring everything. For instance, I choose the setup options per the challenge (e.g. Contentful for my CMS, responsive images, sitemap, metatags) and once I'm done the CLI says "Thanks! Here's what we'll now do:" and indicates that it'll install and configure the plugin for Contentful and install gatsby-plugin-sharp, gatsby-plugin-react-helmet, gatsby-plugin-sitemap, but once I open the project these don't seem to be installed because the packages aren't saved to package.json and my gatsby-config.js is empty.
I also don't get a message that confirms the project was setup correctly, nor do I get an error; the CLI just goes from "Created site from template" to "Installing Gatsby..." and it looks like it's installing everything but then after a little bit it just stops without any further message. I know I can just manually install and configure these things but does anybody know why this is happening/what I'm doing wrong? Cheers!