Error: Failed To Download _hot_ Package For Ghcr.io/devcontainers/features/docker-in-docker

Verify if you can reach the registry by running curl -I https://ghcr.io . If you are on a restricted network (like a university or corporate office), try disconnecting from your VPN or switching to a different network to rule out firewall interference.

Corporate firewalls, VPNs, or specific DNS settings can block the connection to GitHub’s package servers.

Log out of the registry to force a fresh, anonymous pull by running: docker logout ghcr.io Use code with caution. Then, attempt to rebuild your container. 2. Network and Proxy Restrictions Verify if you can reach the registry by

Try pinning the feature to a specific, stable version in your devcontainer.json .

This issue is rarely a bug in the code itself and is usually caused by network restrictions, expired registry credentials, or versioning mismatches in your .devcontainer.json file. Common Causes and Solutions 1. Expired or Invalid GHCR Credentials Log out of the registry to force a

For users on Windows or macOS using Docker Desktop , the experimental "containerd" feature for pulling images can sometimes bypass download errors.

Users on macOS have reported certificate trust issues. Setting the "AAA Certificate Services" in Keychain Access to "Always Trust" has resolved similar download failures for some. 3. Version Pinning Issues Network and Proxy Restrictions Try pinning the feature

json configuration that includes the correct syntax for pinning the feature version?

"features": { "ghcr.io/devcontainers/features/docker-in-docker:2": {} } Use code with caution.

Go to Docker Desktop Settings > General > Beta Features (or Features in development ) and enable "Use containerd for pulling and storing images". Summary Checklist 1 docker logout ghcr.io Clears stale/expired credentials. 2 Check VPN/Firewall Rules out network-level blocking of GHCR. 3 Update .devcontainer.json Ensures you aren't using a broken/archived version tag. 4 Restart VS Code Forces the extension to re-initialize its download logic.