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Learn how NixOS flakes make system configuration reproducible by locking nixpkgs and other inputs, with a concrete minimal web server flake example and practical migration steps.
Home Manager + Nix flakes give you dotfile and app reproducibility across machines, but generation bloat and module drift can undo the benefit. Here’s a practical workflow to keep both your disk and your environment healthy.
A flake-based NixOS configuration that pulls in a large module set can spend a long stretch on nixos-rebuild before any derivation starts building. Nix evaluation is single-threaded, the entire configuration is re-evaluated on every rebuild, and wall-clock time blends evaluation, input fetching, and build planning into one number. The goal is to measure befo
Transition Uncertainty NixOS 23.05 ships with Nix 2.13 while the project continues to evaluate whether flakes should become the default user interface. The experimental flag requirement and potential breakage of classic nix-env workflows create a compatibility boundary that affects configuration management strategies. Constraints and Open Questions Adopting
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