Error [ERR_MODULE_NOT_FOUND]: Cannot find package '@sveltejs/kit' on production build

Describe the bug When I create a new SvelteKit project with the node adapter and try to use the files in the build directory, I get the following error:

Error [ERR_MODULE_NOT_FOUND]: Cannot find package '@sveltejs/kit' imported from [...]

Logs

internal/process/esm_loader.js:74
    internalBinding('errors').triggerUncaughtException(
                              ^

Error [ERR_MODULE_NOT_FOUND]: Cannot find package '@sveltejs/kit' imported from [REDACTED]/app.js
    at packageResolve (internal/modules/esm/resolve.js:655:9)
    at moduleResolve (internal/modules/esm/resolve.js:696:18)
    at Loader.defaultResolve [as _resolve] (internal/modules/esm/resolve.js:810:11)
    at Loader.resolve (internal/modules/esm/loader.js:86:40)
    at Loader.getModuleJob (internal/modules/esm/loader.js:230:28)
    at ModuleWrap.<anonymous> (internal/modules/esm/module_job.js:56:40)
    at link (internal/modules/esm/module_job.js:55:36) {
  code: 'ERR_MODULE_NOT_FOUND'
}

To Reproduce

• create a new SvelteKit skeleton project
• add adapter-node to it
• make sure all the deps have "next" as version
• yarn && yarn build
• isolate the build directory (I only want the production files in my production environment) by moving it somewhere else
• add a package.json file to the directory with the contents: { "type": "module" } (for ESM)
• node . <- This is what triggers the bug

Expected behavior

I expect the build directory to contain everything that is needed to run the app in isolation. Adding the small package.json file is another thing that I do not want to do myself.

When running node . the server should just run.

Information about your SvelteKit Installation:

  System:
    OS: macOS 11.2.3
    CPU: (8) x64 Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
    Memory: 5.37 GB / 16.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 14.16.0 - ~/.volta/tools/image/node/14.16.0/bin/node
    Yarn: 1.22.10 - ~/.volta/tools/image/yarn/1.22.10/bin/yarn
    npm: 7.7.0 - ~/.volta/tools/image/npm/7.7.0/bin/npm
  Browsers:
    Chrome: 90.0.4430.85
    Firefox: 87.0
    Safari: 14.0.3
  npmPackages:
    @sveltejs/kit: ^1.0.0-next.74 => 1.0.0-next.91 
    svelte: ^3.29.0 => 3.37.0 
    vite: ^2.2.2 => 2.2.3 

Severity It’s kind of annoying as I really want my production setup to be ready, but it doesn’t stop me from development.

Additional context All the above steps are done in a Dockerfile for production but I was able to reproduce it outside as well

FROM node:14-alpine as build

ARG VITE_API_URL

RUN mkdir /svelte-build
WORKDIR /svelte-build

ENV VITE_API_URL=${VITE_API_URL}

COPY . .
RUN yarn && yarn build

FROM node:14-alpine as production

RUN addgroup -S app && adduser -S app -G app

RUN mkdir /app && chown app:app /app

USER app

WORKDIR /app

RUN echo '{ "type": "module" }' > /app/package.json
COPY --chown=app:app --from=build /svelte-build/build/ /app

EXPOSE 3000

CMD node index.js