I recently updated my project to use yarn v4. And now I am unable to deploy in railway.

I tried to set the nixpack install script to use yarn 4 but it has a line where it always runs "yarn run v1.22".

Does anyone know a way to fix this?

Error:
╔════════════════════════════ Nixpacks v1.24.0 ═══════════════════════════╗

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║ setup │ nodejs_18, yarn-1_x ║

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║─────────────────────────────────────────────────────────────────────────║

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║ install │ corepack enable && yarn set version stable && yarn install ║

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║─────────────────────────────────────────────────────────────────────────║

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║ build │ yarn compile ║

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║─────────────────────────────────────────────────────────────────────────║

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║ start │ node build/server.js ║

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╚═════════════════════════════════════════════════════════════════════════╝

> [stage-0 8/10] RUN --mount=type=cache,id=s/b19f3ac8-f84d-47bf-9215-801dbb471566-node_modules/cache,target=/app/node_modules/.cache yarn compile:

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0.524 yarn run v1.22.22

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0.567 error backend@1.0.0: The engine "yarn" is incompatible with this module. Expected version ">2.0.0". Got "1.22.22"

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0.578 error Commands cannot run with an incompatible environment.

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0.578 info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

- UndefinedVar: Usage of undefined variable '$NIXPACKS_PATH' (line 18)

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LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 18)

ERROR: failed to solve: process "/bin/bash -ol pipefail -c yarn compile" did not complete successfully: exit code: 1

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Jul 13 19:24:49

Error: Docker build failed