Blitz breaks when Prisma is not installed in certain environments

[merelinguist]

What is the problem?

Steps to Reproduce:

1. See this CodeSandbox

2. Run yarn start

3. This error should be produced:

sandbox@sse-sandbox-j5drt:/sandbox$ yarn start
yarn run v1.22.4
warning package.json: No license field
$ blitz start
You are using alpha software - if you have any problems,please open an issue here:
  https://github.com/blitz-js/blitz/issues/new/choose

(node:418) UnhandledPromiseRejectionWarning: Error: Cannot find module '@prisma/cli'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
    at resolveFileName (/sandbox/node_modules/resolve-from/index.js:29:39)
    at resolveFrom (/sandbox/node_modules/resolve-from/index.js:43:9)
    at module.exports (/sandbox/node_modules/resolve-from/index.js:46:47)
    at module.exports.moduleId (/sandbox/node_modules/resolve-cwd/index.js:4:30)
    at Object.resolveBinAsync (/sandbox/node_modules/@blitzjs/server/dist/server.cjs.development.js:1372:35)
    at getPrismaBin (/sandbox/node_modules/@blitzjs/cli/lib/src/commands/db.js:12:37)
    at /sandbox/node_modules/@blitzjs/cli/lib/src/commands/db.js:16:29
    at Generator.next (<anonymous>)
    at /sandbox/node_modules/tslib/tslib.js:113:75
(node:418) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:418) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Versions:

debug: local
debug: pkgPath: /sandbox/node_modules/@blitzjs/cli

Linux 4.19 | linux-x64 | Node: v10.20.1

blitz: 0.7.0 (global)
blitz: 0.7.0 (local)

Supporting Documentation

See above.