Hi, I am working on the tutorial 'Building a GraphQL server with `graphql-yoga`' with Prisma 1.7 and trying to invoke a post-deployment hook to generate the schema. I have included the following line in prisma.yml: "- graphql get-schema --project blogr" - I get an error when going for prisma deploy: " 'ENOENT': spawn graphql ENOENT" . Any idea why this is? Many thanks