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How to update nix-tools

  1. Use niv to update the sources.json:

    nix flake update nix-tools

  2. If nix-tools.cabal or plan-to-nix have changed, check the materialized files for each of the compiler nix name in ls -d materialized/ghc*/nix-tools with:

    nix-build scripts/check-compiler-materialization --argstr compiler-nix-name ghc884