feat(nix): bump nixpkgs & use verilator 5.042 with optimization patch #70
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Pull request overview
This PR updates the Nix development environment by bumping nixpkgs from version 25.05 to 25.11 and upgrading Verilator from version 5.040 to 5.042 with an optimization patch to improve simulation performance.
- Upgrades nixpkgs to nixos-25.11
- Updates Verilator to version 5.042 with new source hash
- Replaces nixpkgs upstream patches with a performance optimization patch from PR #6822
Reviewed changes
Copilot reviewed 1 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| flake.nix | Updates nixpkgs reference to 25.11, upgrades Verilator to 5.042, and applies optimization patch for improved mux performance |
| flake.lock | Updates lock file to reflect nixpkgs 25.11 with corresponding revision and hash updates |
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Is it already replaced by #71? |
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Yan-Muzi
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Jan 26, 2026
Including: - bump nix flake - verilator 5.040 -> 5.044 - clang default (18 on ubuntu 24.04, or 14 on ubuntu 22.04) -> 19 - openjdk 11 -> 21 Also: - add llvmPackages.bolt in nix devshell for pgo - print clang version in nix devshell Close #70
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Overrides to verilator:
This should have some benefit in improving simulation speed