From 26fc82ade8e6fde6858df1ed53bafa64719f2f15 Mon Sep 17 00:00:00 2001
From: sommerfeld <sommerfeld@sommerfeld.dev>
Date: Wed, 13 May 2026 13:43:40 +0100
Subject: feat(nix): saturate builds, add community cache, pin nixpkgs registry
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- Drop auto-optimise-store: slows every build for modest disk savings.
  Run 'nix store optimise' manually if disk pressure ever shows up.
- max-jobs=auto, cores=0: defaults are 1/1, which left most of the box
  idle during large closures (LLVM, protobuf, …).
- Add nix-community.cachix.org as an extra substituter with its public
  key. Big hit-rate boost against nixos-unstable, which is what the new
  user registry points 'nixpkgs' at.
- dot_config/nix/registry.json pins 'nixpkgs' indirect ref to
  github:NixOS/nixpkgs/nixos-unstable, so 'nix shell nixpkgs#foo' is
  fast + reproducible. Project flakes are unaffected — they pin their
  own inputs via flake.lock.
---
 dot_config/nix/registry.json | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 dot_config/nix/registry.json

(limited to 'dot_config')

diff --git a/dot_config/nix/registry.json b/dot_config/nix/registry.json
new file mode 100644
index 0000000..387ea7a
--- /dev/null
+++ b/dot_config/nix/registry.json
@@ -0,0 +1,17 @@
+{
+  "version": 2,
+  "flakes": [
+    {
+      "from": {
+        "type": "indirect",
+        "id": "nixpkgs"
+      },
+      "to": {
+        "type": "github",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "ref": "nixos-unstable"
+      }
+    }
+  ]
+}
-- 
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