Cannot change nixpkgsArchive hash from railway.toml

Hello, seems like I can't change the nixpkgs archive version from railway.toml

[build]
builder = "NIXPACKS"

[deploy]
startCommand = "./api"
healthcheckPath = "/health"
healthcheckTimeout = 100

[build.nixpacksPlan.phases.setup]
nixpkgsArchive = 'a459b363de387c078080b719b30c54d8a79b4a3e'
nixPkgs = ["ffmpeg"]

[build]
builder = "NIXPACKS"

[deploy]
startCommand = "./api"
healthcheckPath = "/health"
healthcheckTimeout = 100

[build.nixpacksPlan.phases.setup]
nixpkgsArchive = 'a459b363de387c078080b719b30c54d8a79b4a3e'
nixPkgs = ["ffmpeg"]

Here's the full railway.toml I'm using. In the build log it sucessfully recognize that ffmpeg need to be installed and it does ! but no matter what it seems to use 5148520bfab61f99fd25fb9ff7bfbb50dad3c9db as nixpkg version

#7 [3/5] COPY .nixpacks/nixpkgs-5148520bfab61f99fd25fb9ff7bfbb50dad3c9db.nix .nixpacks/nixpkgs-5148520bfab61f99fd25fb9ff7bfbb50dad3c9db.nix

The reason I want to check to another version is because 5148520bfab61f99fd25fb9ff7bfbb50dad3c9db contains ffmpeg 5.1.3 and I'd like to get ffmpeg 6.1.1

Solution:

first remove the phase stuff from your railway.toml then add this to a nixpacks.toml file that i assume you'd want located in the same location as the railway.toml file - ```toml [phases.setup] nixpkgsArchive = 'a459b363de387c078080b719b30c54d8a79b4a3e'...

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15 Replies

Percy•7mo ago

Project ID: 8bccf693-4059-4ef3-9dd0-55493979fdb7

AlaanorOP•7mo ago

8bccf693-4059-4ef3-9dd0-55493979fdb7

Brody•7mo ago

I've noticed this too, you can't set archives for phases in either a railway.json or railway.toml file, you'd have to specify the nixpacks stuff in a nixpacks.toml file

AlaanorOP•7mo ago

Is there somewhere a documentation where it explain how I can use a nixpacks.toml with railway ? I'm in a monorepo so it can't just be at root (and thanks :PraygeW: , glad to see I'm not alone on this)

Solution

Brody•7mo ago

first remove the phase stuff from your railway.toml then add this to a nixpacks.toml file that i assume you'd want located in the same location as the railway.toml file -

[phases.setup]
  nixpkgsArchive = 'a459b363de387c078080b719b30c54d8a79b4a3e'
  nixPkgs = ['...', 'ffmpeg']

[phases.setup]
  nixpkgsArchive = 'a459b363de387c078080b719b30c54d8a79b4a3e'
  nixPkgs = ['...', 'ffmpeg']

and finally set a NIXPACKS_CONFIG_FILE service variable to the applicable path of your new nixpacks.toml file

AlaanorOP•7mo ago

oh the env variable is how you link it thanks the 3 dot you added on nixPkgs are intentional ?

Brody•7mo ago

yes, without them you are telling nixpacks to only install ffmpeg

AlaanorOP•7mo ago

I see ! I can confirm this is working well now ! Everything is working, thanks again !

Brody•7mo ago

no problem!

Donald Lee (312477)•7mo ago

How did you find the path to your nixpacks.toml file? I don't yet know how to ssh onto the server to look around how the structure is like? I'm running a rails app, sorry for dumb q. 😛

Brody•7mo ago

what path do you have it in your repo?

Donald Lee (312477)•7mo ago

Thanks for the response @Brody , it's in the root

Brody•7mo ago

and do you have to root directory in the service settings set to anything?

AlaanorOP•7mo ago

The same way you have railway.toml. So either path specified in the dashboard in your deployed service, or by default at the root of the deployment.

Donald Lee (312477)•7mo ago

Thanks guys! It was at /nixpacks.toml because i just saw on the dash that railway uses / by default.

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Cannot change nixpkgsArchive hash from railway.toml