Railway•8mo ago

Rust - ERROR [stage-0 3/9] COPY .nixpacks/nixpkgs...

We have successfully managed to run our Rust service locally, and it builds properly on CI in GitHub. However, we recently started using Railway and are facing an error in the deployment. I have tried running 'nixpacks build .' on my local machine but it fails with a similar error. In an attempt to understand what's going on, I added a dummy 'nixpacks.toml' file to the project's root, but it doesn't seem to be getting picked up.

name = "your-project-name"
version = "0.1.0"

[build]
commands = [
    "mkdir -p bin",
    "cargo build --release --package core-api",
    "cp target/release/core-api bin"
]

[start]
commands = [
    "./bin/core-api"
]

[dependencies]
nix = "nixpkgs-5148520bfab61f99fd25fb9ff7bfbb50dad3c9db.nix"

name = "your-project-name"
version = "0.1.0"

[build]
commands = [
    "mkdir -p bin",
    "cargo build --release --package core-api",
    "cp target/release/core-api bin"
]

[start]
commands = [
    "./bin/core-api"
]

[dependencies]
nix = "nixpkgs-5148520bfab61f99fd25fb9ff7bfbb50dad3c9db.nix"

Can I get some help to understand what the problem is?

27 Replies

Percy•8mo ago

Project ID: 8811bf1a-27f3-48f9-9c58-440d79085151

DarthAI•8mo ago

Project ID: 8811bf1a-27f3-48f9-9c58-440d79085151

Brody•8mo ago

is that an AI generated nixpacks.toml?

DarthAI•8mo ago

yes, I have added that one after the errors and failures. I don't think it's being picked up

Brody•8mo ago

it's not being picked up because the syntax is completely wrong lmao

DarthAI•8mo ago

😄

Brody•8mo ago

never take what what an AI says at face value take the time to manually read the docs, it will pay off https://nixpacks.com/docs/configuration/file show me your new nixpacks.toml? stop deleting stuff lol

DarthAI•8mo ago

my bad

DarthAI•8mo ago

Alright, the file is being picked up but back to square one with the errors (attached) Here is my file

[phases.build]
cmds = ['cargo build --release']

[variables]
CARGO_HOME = '/app/.cargo'
RUSTUP_HOME = '/app/.rustup'

[staticAssets]
# Add any static assets here.

[phases.setup]
nixOverlays = ['https://github.com/oxalica/rust-overlay/archive/master.tar.gz']
nixPkgs = ['rustc', 'cargo']

[start]
runImage = 'debian:bullseye-slim'
onlyIncludeFiles = ['./target/release/railway_mento']

[phases.build]
cmds = ['cargo build --release']

[variables]
CARGO_HOME = '/app/.cargo'
RUSTUP_HOME = '/app/.rustup'

[staticAssets]
# Add any static assets here.

[phases.setup]
nixOverlays = ['https://github.com/oxalica/rust-overlay/archive/master.tar.gz']
nixPkgs = ['rustc', 'cargo']

[start]
runImage = 'debian:bullseye-slim'
onlyIncludeFiles = ['./target/release/railway_mento']

message.txt

Brody•8mo ago

have you read the documentation for nixpacks?

DarthAI•8mo ago

You mean the whole website or the link you shared? If you can share a proper nixpacks.toml file that works for Rust that is really helpful

Brody•8mo ago

why do you need to use one in the first place?

DarthAI•8mo ago

I do not need to, I want to get our rust server code to build on Railway and get deployed It's building and running fine locally and builds fine on Github. Railway uses NixPacks and that's where the errors are coming from

Brody•8mo ago

try disabling nixpacks cacheing

DarthAI•8mo ago

Is that something that I do on Railway?

Brody•8mo ago

https://nixpacks.com/docs/configuration/environment

DarthAI•8mo ago

What should be the value for that env var? I'm setting getting the same error with empty and true Deployement ID if you can check 6760beb2-1a61-42d0-887b-c5dd0ee17010

Brody•8mo ago

it would be any value, i don't work for Railway so I can't check

DarthAI•8mo ago

Ah! Thanks for helping me!

Brody•8mo ago

I think it might be best for you to move to a Dockerfile based build

DarthAI•8mo ago

I do have a docker compose file that cobines a bunch of things, that's what we are using locally and on github But NixPacks does not pick it up

Brody•8mo ago

you seem to have a good understanding of how rust apps are built and ran so throwing together a dockerfile should not be a problem for you railway does not support docker compose files

DarthAI•8mo ago

Alright so from your knowledge with Railway can I point it to a dockerfile in the sub folders or it should be at root?

Brody•8mo ago

if you had your rust app in an /api subfolder for example, you would put the dockerfile in that subfolder and then point the services root directory to that subfolder, and then the dockerfile is automatically picked up

DarthAI•8mo ago

Thanks! I'll give that a shot, thanks for helping out lost folks

Brody•8mo ago

no problem 🙂

jr•8mo ago

You also shouldn't need a nixpacks.toml file to build and deploy rust apps. You can try deleting the file and deploying

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Rust - ERROR [stage-0 3/9] COPY .nixpacks/nixpkgs...