CLI command > railway variable set NIXPACKS_NO_CACHE=1 remove cache or railway variable set RAILPACK_NO_CACHE=1

nope that doesn't solve it

The error no space left on device on /var/lib/buildkit/runc-overlayfs/containerdmeta.db means the build machine's disk is full — it's a Railway infrastructure-level issue, not something in your code or Dockerfile.

A few things to try:

1. Retry the deployment — Railway periodically recycles build machines, so a fresh retry may land on a builder with available disk space.

2. Disable the build cache — Set the environment variable NIXPACKS_NO_CACHE=1 (or RAILPACK_NO_CACHE=1 if you're using Railpack) to prevent the builder from writing large cache layers. You can do this via the Railway dashboard under your service's Variables, or via CLI:

   
   railway variables set NIXPACKS_NO_CACHE=1
   

   This reduces the disk footprint during the build.

3. Check for unnecessarily large build artifacts — If your Dockerfile copies in large files or has many layers, consider using a multi-stage build so intermediate artifacts are discarded and don't fill the overlay filesystem.

Note: Given that Railway is currently experiencing a build incident (as noted in the banner), the build machines may be under higher-than-normal load and disk pressure. Waiting a short while and retrying may resolve it on its own once the incident is fully resolved.

no setting the no_cache var doesn't work either

The BuildKit daemon ran out of space writing to /var/lib/buildkit/runc-overlayfs/containerdmeta.db. Running docker system prune -a should resolve it immediately in most cases

Clean up Docker resources (most effective)

Remove all unused containers, networks, images, and build cache

docker system prune -a

If you also want to remove volumes

system prune -a --volumes

1. Check disk usage first

bash

df -h

docker system df

1. More targeted cleanup

bash#

Remove stopped containers

docker container prune

Remove unused images

image prune -a

Remove build cache specifically

docker builder prune -a

If disk is still full

Find large files/directories

du -sh /* 2>/dev/null | sort -rh | head -20

Check Docker's storage directory specifically

du -sh /var/lib/docker/*

if this helps please reply and mark as solved

cheers

The error "no space left on the device" should be fixed now on railway. Caused From yesterday's major Railway incident. Redeploy should make it work.