I've been having this issue since yesterday. I've tried everything, it seems the issue is from railway. Please I need a fix.

- 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)

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Dockerfile:24

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22 | # build phase

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23 | COPY . /app/.

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24 | >>> RUN --mount=type=cache,id=s/9afee07d-7fbe-4bb2-9b90-39ae81af038a-next/cache,target=/app/.next/cache --mount=type=cache,id=s/9afee07d-7fbe-4bb2-9b90-39ae81af038a-node_modules/cache,target=/app/node_modules/.cache npm run build

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25 |

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26 |

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-------------------

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

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Jul 27 17:02:40

Error: Docker build failed