Overview

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Flox is a virtual environment and package manager all in one. With Flox you create development environments that put you into reproducible subshells with dependencies provided and configured for you. Even better, these environments layer so you can prepare different environments for different contexts and stack them when needing to work across contexts.
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- One-Command Project Setup
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- Environments With All the Comforts of HOME
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Container
- Amazon ECS
- Amazon EKS
- Amazon ECS Anywhere
- Amazon EKS Anywhere
Container image
Containers are lightweight, portable execution environments that wrap server application software in a filesystem that includes everything it needs to run. Container applications run on supported container runtimes and orchestration services, such as Amazon Elastic Container Service (Amazon ECS) or Amazon Elastic Kubernetes Service (Amazon EKS). Both eliminate the need for you to install and operate your own container orchestration software by managing and scheduling containers on a scalable cluster of virtual machines.
Version release notes
Note: This release includes changes to how package outputs are handled that may trigger automatic manifest migrations. Migrated manifests will require CLI version 1.10.0 or above. See the Changes section below for details.
Compatibility policy
Starting with this release, the Flox CLI is schema-aware. It detects when modifications to an environment are backwards compatible, and automatically migrates manifests when changes aren't backwards compatible. The version field has been replaced with a schema-version field. See the compatibility policy docs for details.
Features
- Package outputs are now supported, allowing you to specify which package outputs to include in your environment using flox install curl^bin or by setting outputs in the manifest.
- flox install and flox search now show hints when a package has additional package outputs available.
- The "building from source" spinner now explains why a package is being built from source (e.g. marked as unfree or has no upstream build available).
Changes
- Package installations now include only the default package outputs defined by the upstream Nix package. Previously, all package outputs were installed. Existing environments that relied on non-default package outputs will be automatically migrated to set outputs = "all" for those packages in the manifest, preserving existing behavior. Note that migrated manifests will require CLI version 1.10.0 or above.
Fixes
- flox edit --sync and flox edit --reset now work for FloxHub environments, previously failing with "Cannot sync local or remote environments."
- flox activate -m dev no longer incorrectly adds coreutils binaries to the path, fixing a regression from v1.9.0.
- Bash completion now works for flox activate positional arguments, and flox activate -c no longer produces an eval error when tab-completing inside quotes.
- Removed several unused internal FLOX_* environment variables from flox activate.
Thank you to our community contributions this release
- Fix deprecated hostPlatform Nix warnings (@noor-latif)
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Additional details
Usage instructions
Welcome to the Flox tool. Try out a few commands:
- flox search fastfetch
- flox install fastfetch
- flox activate -- fastfetch
- flox edit to make changes to the manifest.toml, add/remove packages and set hooks!
See more comprehensive documentation and a tutorial at https://flox.dev/docs/ .
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