Very likely the same error as described here:
https://help.railway.app/questions/cannot-install-with-frozen-lockfile-be-be29918d
https://github.com/railwayapp/nixpacks/issues/1091

However I followed their recommendation and added the nixfile as they did, but still getting an error.
You can find my repo here which is a fork of nextra
My repo: https://github.com/mecattaf/nextra

There is a tiny chance that my changes may be the cause for this, specifically:
I have a custom root directory set: /examples/my-site/
And I have a custom Start command: pnpm run start
This is meant to work in tandem with the nixfile:

providers = ["node"]

[phases.install]
cmds = ["npm install -g corepack", "corepack enable", "corepack prepare pnpm@9.1.0 --activate", "pnpm install"]

I am specifically trying to launch /examples/my-app during this operation.

Your help is much appreciated!
T

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