The problem is that you are trying to install an old version of Python (3.8). In your nixpacks.toml file, can you try changing to python3 instead. This will use version 3.11 which is much newer.

Thanks. I updated that, but it fails on a new error now. This commit did previously build. I started getting this build error after updating an env var.

10 6.460 /bin/bash: line 1: node-gyp: command not found

10 6.460

10 6.460 error: install script from "unix-dgram" exited with 127

10 ERROR: process "/bin/bash -ol pipefail -c bun i --no-save" did not complete successfully: exit code: 127

[stage-0 6/10] RUN --mount=type=cache,id=s/32b76108-4485-4302-9ca3-968d91f98d33-/root/bun,target=/root/.bun bun i --no-save:

0.444 bun install v1.1.8 (89d25807)

0.448 Resolving dependencies

0.749 Resolved, downloaded and extracted [2]

6.460 /bin/bash: line 1: node-gyp: command not found

6.460

6.460 error: install script from "unix-dgram" exited with 127

Dockerfile:20

18 | ENV NIXPACKSPATH /app/nodemodules/.bin:$NIXPACKS_PATH

19 | COPY . /app/.

20 | >>> RUN --mount=type=cache,id=s/32b76108-4485-4302-9ca3-968d91f98d33-/root/bun,target=/root/.bun bun i --no-save

21 |

22 | # build phase

ERROR: failed to solve: process "/bin/bash -ol pipefail -c bun i --no-save" did not complete successfully: exit code: 127

Error: Docker build failed

Railway recently updated the version of Bun that is installed by default (1.1.8). This looks to have subsequently broke some builds that rely on node-gyp. The problem seems to be that node-gyp is not found. Which is strange as I expected bun to install it as a sub-dependency. You can try adding it to the package.json file (e.g. bun i node-gyp). Some initial research shows that this seems to be a Bun issue that a few others are experiencing too

• https://github.com/oven-sh/bun/issues/10707

• https://github.com/oven-sh/bun/issues/10368

However, I am not ruling out that it is an issue with how we are building with Node and Bun. Could you please provide a list of the dependencies that Bun is installing so I can investigate further (sharing a slimmed down package.json file works).

Alternatively, you can also downgrade the version of Nixpacks that Railway is using to go back to a known working version. In a railway.json file you can add the contents

{
   "$schema":"https://railway.app/railway.schema.json",
   "build":{
      "nixpacksVersion":"1.21.2",
   }
}

This will build with the version that you were using previously.

Thanks jr :) We added node-gyp to our package.json and that fixed the issue.

Here's our dependencies if that helps:

"dependencies": {
"@bloxroute/solana-trader-client-ts": "^2.1.2",
"@company-z/scarab-schema": "1.12.5",
"@coral-xyz/anchor": "^0.29.0",
"@jup-ag/api": "^6.0.19",
"@prisma/client": "^5.13.0",
"@sentry/node": "^7.113.0",
"@sentry/types": "^7.113.0",
"@solana/buffer-layout": "^4.0.1",
"@solana/spl-token": "^0.4.6",
"@solana/web3.js": "^1.91.8",
"@turnkey/api-key-stamper": "^0.4.0",
"@turnkey/http": "^2.10.0",
"@turnkey/solana": "^0.3.5",
"@turnkey/viem": "^0.4.17",
"bignumber.js": "^9.1.2",
"bs58": "^5.0.0",
"bullmq": "^5.7.8",
"debug": "^4.3.4",
"dotenv": "^16.4.5",
"fastify": "^4.26.2",
"inversify": "^6.0.2",
"ioredis": "^5.4.1",
"node-cron": "^3.0.3",
"node-gyp": "^10.1.0",
"reflect-metadata": "^0.1.14",
"repl": "^0.1.3",
"reverse-mirage": "^1.0.3",
"viem": "~2.7.22",
"winston": "^3.13.0",
"winston-syslog": "^2.7.0",
"ws": "^8.17.0",
"yn": "^5.0.0",
"zod": "^3.23.6"
},
"devDependencies": {
"@types/debug": "^4.1.12",
"@types/eslint": "^8.56.10",
"@types/jest": "^29.5.12",
"@types/node": "^20.12.10",
"@types/node-cron": "^3.0.11",
"@types/supertest": "^2.0.12",
"@types/winston-syslog": "^2.4.3",
"@types/ws": "^8.5.10",
"@typescript-eslint/eslint-plugin": "^7.5.0",
"@typescript-eslint/parser": "^7.5.0",
"chalk": "^5.3.0",
"eslint": "^8.57.0",
"eslint-config-prettier": "^9.1.0",
"eslint-plugin-jest": "^27.9.0",
"eslint-plugin-prettier": "^5.1.3",
"eslint-plugin-simple-import-sort": "^12.1.0",
"jest": "^29.7.0",
"jest-mock-extended": "^3.0.7",
"prettier": "^3.2.5",
"prisma": "^5.13.0",
"supertest": "^6.3.4",
"ts-jest": "^29.1.2",
"ts-node": "^10.9.2",
"ts-node-dev": "^2.0.0",
"typescript": "^5.4.5",
"zod-prisma-types": "^3.1.6"
},
"engines": {
"node": "20.x"
}