`npm run build` fails with `TypeError: Path must be a string. Received undefined`

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When I try to npm run build on the example project, it fails:

C:\ws\preact-book-example>npm run build

> preact-book-example@0.0.0 build C:\ws\preact-book-example
> npm run build:firebase && preact build

npm WARN invalid config loglevel="notice"

> preact-book-example@0.0.0 build:firebase C:\ws\preact-book-example
> preact serve --server config > firebase.json

TypeError: Path must be a string. Received undefined
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! preact-book-example@0.0.0 build:firebase: `preact serve --server config > firebase.json`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the preact-book-example@0.0.0 build:firebase script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
...

As you can see, I am running this on Windows.

Any ideas as to what is going wrong here?

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Running the commands in the build script separately shows us that it's build:firebase that is failing:

C:\ws\preact-book-example>preact build
Build [==================  ] 91% (2.3s) additional chunk assets processing
  Total precache size is about 153 kB for 16 resources.

C:\ws\preact-book-example>preact serve --server config > firebase.json
TypeError: Path must be a string. Received undefined

I searched for the error message and found issues /questions related to Jest...
standard-things/esm#124
jestjs/jest#4562
https://stackoverflow.com/questions/46220674/jest-typeerror-path-must-be-a-string-received-undefined

Currently trying to see if I can upgrade Jest to fix this as comments suggest it's an ald issue fixed in a recent release.

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I upgraded Jest but it did not help...

C:\ws\preact-book-example>npm uninstall --save-dev jest
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN ajv-keywords@2.1.1 requires a peer of ajv@^5.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.3 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

removed 140 packages in 71.299s

C:\ws\preact-book-example>npm install --save-dev jest
npm WARN ajv-keywords@2.1.1 requires a peer of ajv@^5.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.3 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

+ jest@22.4.2
added 230 packages from 143 contributors in 106.243s

C:\ws\preact-book-example>preact serve --server config > firebase.json
TypeError: Path must be a string. Received undefined

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I think I found the culprit. It seems to be an issue in preact-cli itself:

preactjs/preact-cli#512

We should just wait for it to be fixed and then upgrade I guess.