Nixpacks Bug Report - bun command not found after deploy to railway

[0xMALVEE]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

bun command is not found in railway after deployment. Sometimes it works without issues in my other repos but sometimes it just doesn't work.

What I have tried:
I tried to add nixpacks.toml , but still no luck it just doesn't work

[phases.setup]
nixpkgsArchive = 'c1d2c1d6ca36b8183ec48d789a0b8ac432a3bd8b'

[deploy]
startCommand = 'bun run ./src/index.ts'

This is my package.json for referance

{
  "name": "nextjs",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "dev:web": "next dev --turbo",
    "build": "next build",
    "start:web": "next start",
    "lint": "next lint",
    "db:generate": "drizzle-kit generate:pg",
    "db:push": "drizzle-kit push:pg",
    "db:studio": "drizzle-kit studio",
    "db:drop": "drizzle-kit drop",
    "start": "bun run ./src/index.ts",
    "dev": "next dev --turbo"
  },
  "dependencies": {
    "@hookform/resolvers": "^3.10.0",
    "@radix-ui/react-checkbox": "^1.1.3",
    "@radix-ui/react-dialog": "^1.1.2",
    "@radix-ui/react-dropdown-menu": "^2.1.2",
    "@radix-ui/react-label": "^2.1.0",
    "@radix-ui/react-popover": "^1.1.2",
    "@radix-ui/react-radio-group": "^1.2.2",
    "@radix-ui/react-scroll-area": "^1.2.0",
    "@radix-ui/react-select": "^2.1.2",
    "@radix-ui/react-separator": "^1.1.0",
    "@radix-ui/react-slot": "^1.1.1",
    "@radix-ui/react-tabs": "^1.1.1",
    "@radix-ui/react-toast": "1.2.4",
    "@radix-ui/react-toggle": "^1.1.0",
    "@react-google-maps/api": "^2.20.5",
    "@slapinc/slappos-client": "1.2.5",
    "@tanstack/react-query": "^5.59.16",
    "@tiptap/pm": "^2.9.0",
    "@tiptap/react": "^2.9.0",
    "@tiptap/starter-kit": "^2.9.0",
    "@types/node": "22.7.8",
    "@types/pg": "^8.11.0",
    "@types/react": "npm:types-react@rc",
    "@types/react-dom": "npm:types-react-dom@rc",
    "ai": "^3.4.18",
    "autoprefixer": "10.4.20",
    "axios": "^1.7.7",
    "class-variance-authority": "^0.7.0",
    "clsx": "^2.1.1",
    "cmdk": "^0.2.1",
    "discord-interactions": "^4.1.0",
    "discord.js": "^14.17.3",
    "dotenv": "^16.4.7",
    "drizzle-orm": "^0.29.3",
    "elysia": "^1.2.10",
    "embla-carousel-react": "^8.5.2",
    "eslint": "^9.13.0",
    "eslint-config-next": "15.0.0",
    "framer-motion": "12.0.0-alpha.1",
    "jose": "^5.9.6",
    "leaflet": "^1.9.4",
    "lowlight": "^3.1.0",
    "lucide-react": "^0.453.0",
    "next": "15.0.0",
    "next-auth": "^4.24.10",
    "next-cloudinary": "^6.16.0",
    "next-themes": "^0.3.0",
    "novel": "^0.5.0",
    "openai": "^4.68.2",
    "pg": "^8.11.3",
    "postcss": "8.4.47",
    "postgres": "^3.4.3",
    "react": "19.0.0-rc-65a56d0e-20241020",
    "react-dom": "19.0.0-rc-65a56d0e-20241020",
    "react-error-boundary": "^4.1.2",
    "react-hook-form": "^7.54.2",
    "react-hot-toast": "^2.4.1",
    "react-icons": "^5.3.0",
    "react-leaflet": "^5.0.0",
    "react-markdown": "^9.0.1",
    "react-use-cart": "^1.14.0",
    "sonner": "^1.5.0",
    "tailwind-merge": "^2.5.4",
    "tailwindcss": "3.4.14",
    "tailwindcss-animate": "^1.0.7",
    "ts-pattern": "^5.5.0",
    "typescript": "5.6.3",
    "use-debounce": "^10.0.4",
    "uuid": "^11.0.5",
    "vaul": "^1.1.2",
    "zod": "^3.24.1"
  },
  "overrides": {
    "@types/react": "npm:types-react@rc",
    "@types/react-dom": "npm:types-react-dom@rc"
  },
  "devDependencies": {
    "@types/leaflet": "^1.9.16",
    "drizzle-kit": "^0.20.14",
    "@types/bun": "latest"
  },
  "peerDependencies": {
    "typescript": "^5.0.0"
  },
  "engines": {
    "node": ">=20.0.0"
  }
}

To reproduce

I really don't know how to reproduce cuz some of my other railway repos are working fine but I got this issue on them in the past also and it auto fixed it someone no idea.

Expected behavior

No response

Environment

Railway Nixpacks

[brody192]

Hello,

Bun is detected and installed when a bun lock file is found, if an npm package-lock.json file is found, bun will not be used.

Please make sure you only have a bun lock file present in your repository.

[0xMALVEE]

Hello,

Bun is detected and installed when a bun lock file is found, if an npm package-lock.json file is found, bun will not be used.

Please make sure you only have a bun lock file present in your repository.

So I am using pnpm so no package-lock.json but pnpm-lock.yaml
But I still have bun.lockb file , having both will be a issue is it? Should I remove the pnpm-lock.yaml then

[brody192]

That is correct, if anything other than only a bun lock file is found, bun will not be used.

[0xMALVEE]

That is correct, if anything other than only a bun lock file is found, bun will not be used.

Thanks @brody192 it works now.