fix(nix): replace deprecated nixfmt-rfc-style with nixfmt#114
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nixfmt-rfc-style is now the same as pkgs.nixfmt and should be used instead. This removes the explicit package override in treefmt and updates devShells to use the standard nixfmt package. - Remove nixfmt.package override in treefmt config (defaults to nixfmt) - Replace nixfmt-rfc-style with nixfmt in devShells.default - Update nix-workflow.md documentation to reflect the change
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Pull request overview
This PR updates the Nix flake configuration to replace the deprecated nixfmt-rfc-style package with nixfmt, ensuring the project uses the current standard formatter.
Changes:
- Removed explicit package override in treefmt configuration (defaults to nixfmt now)
- Updated devShells.default to use
nixfmtinstead ofnixfmt-rfc-style - Updated documentation to reflect the package name change
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| flake.nix | Removed deprecated package override and updated development shell package reference |
| .claude/rules/nix-workflow.md | Updated example code to show nixfmt instead of nixfmt-rfc-style |
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This was referenced Jan 22, 2026
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Summary
nixfmt.package = pkgs.nixfmt-rfc-styleoverride in treefmt config (now defaults to nixfmt)nixfmt-rfc-stylewithnixfmtin devShells.defaultTest plan
nix flake checkpasses without deprecation warningSummary by cubic
Switched from nixfmt-rfc-style to nixfmt across the flake to remove deprecation warnings and standardize formatting. Removed the treefmt nixfmt.package override (now defaults to nixfmt), updated devShells, and refreshed nix-workflow docs.
Written for commit b4823cd. Summary will update on new commits.