Nixpacks

Windows · Mac · Linux · Self-hosted

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Freedom report

One barScore 5.3

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedThinly documented

Nixpacks is ranked #19 of 32 in container build tools on Freedom251. It runs on Linux, macOS, Self-hosted, Windows.

Compared on container build tools

Build method: local_daemon
Multi-architecture builds: No
Build cache backends: multiple

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The record

Purpose: Nixpacks takes a source directory and produces an OCI compliant image that can be deployed anywhere.
Maintenance status: The project is in maintenance mode, is not under active development, and recommends Railpack as a replacement.
Open source: Nixpacks was started by Railway and is open source on GitHub.
Build process: Nixpacks analyzes an app directory to create a reproducible build plan, then builds an OCI-compliant image using Docker BuildKit.
Automatic detection: Language providers are matched against the app source directory and suggest Nix packages and install, build, and start commands.
Customization: Users can override provider suggestions, add Nix or Apt packages, and customize build and start commands.
Language support: The documentation lists providers including Clojure, .NET, Deno, Elixir, Go, Java, Node, PHP, Python, Ruby, Rust, Swift, and Zig.
Caching: Providers cache directories during install and build phases by default, and users can change the cache key or disable caching.
Integrations: Nixpacks is available as a builder on Railway and has a GitHub Action for building containers and pushing them to a registry.
Installation platforms: Installation options include macOS through Homebrew or MacPorts, Windows through Scoop or MSI releases, and Debian or Ubuntu through .deb releases.
Runtime requirement: Building and running the output image uses Docker, and the documentation describes image creation with docker build.
Architecture limit: Nixpacks does not support building multiple architectures in one build; separate builds are required before creating a multi-architecture image.
Reproducible plans: A build plan can be saved and reused later to build the image with the same configuration.

Where it ranks on Freedom251

Best Container Build Tools in 2026#19 of 32

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Sources

nixpacks.com/docs· checked 4 Oct 2026
nixpacks.com/docs/getting-started· checked 4 Oct 2026
nixpacks.com/docs/how-it-works· checked 4 Oct 2026
nixpacks.com/docs/guides/configuring-builds· checked 4 Oct 2026
nixpacks.com/docs/configuration/caching· checked 4 Oct 2026
nixpacks.com/docs/deploying/railway· checked 4 Oct 2026
nixpacks.com/docs/install· checked 4 Oct 2026
nixpacks.com/docs/cli· checked 4 Oct 2026