Initial commit

hosts/machine/kanade/modules/nix.nix

@@ -0,0 +1,37 @@
+{ ... }:
+{
+  nixpkgs.config.allowUnfree = true;
+
+  nix.settings = {
+    sandbox = "relaxed";
+    experimental-features = [
+      "nix-command"
+      "flakes"
+    ];
+    # Optimising during every build can race on Darwin. Run it separately instead.
+    auto-optimise-store = false;
+    trusted-users = [
+      "imnyang"
+    ];
+    substituters = [
+      "https://cache.mizuki.guru"
+      "https://nix.mizuki.my/public"
+    ];
+    trusted-public-keys = [
+      "cache.mizuki.guru-1:EbUC9b0ryD7BJKqfT8fl4GoS2ojLV+hI9fW1al5Whp0="
+      "public:SnHrtrxbCPcZujbJdgsKFeObTfRKQl5KhrI+LljtZUE="
+    ];
+  };
+
+  nix.optimise.automatic = true;
+
+  nix.gc = {
+    automatic = true;
+    interval = {
+      Weekday = 0;
+      Hour = 3;
+      Minute = 15;
+    };
+    options = "--delete-older-than 7d";
+  };
+}