base: move basic Nix configuration

base/default.nix

@@ -1,6 +1,7 @@
 { ... }:
 {
   imports = [
+    ./nix.nix
     ./users.nix
   ];
 }

base/nix.nix

@@ -0,0 +1,22 @@
+{ pkgs, ... }:
+{
+  nix = {
+    package = pkgs.nixUnstable;
+    extraOptions = ''
+      experimental-features = nix-command flakes
+    '';
+
+    binaryCaches = [
+      "https://alarsyo.cachix.org"
+    ];
+    binaryCachePublicKeys = [
+      "alarsyo.cachix.org-1:A6BmcaJek5+ZDWWv3fPteHhPm6U8liS9CbDbmegPfmk="
+    ];
+
+    gc = {
+      automatic = true;
+      dates = "03:15";
+      options = "--delete-older-than 30d";
+    };
+  };
+}

hosts/poseidon/default.nix

@@ -121,24 +121,4 @@ in
 
 
   boot.supportedFilesystems = [ "btrfs" ];
-
-  nix = {
-    package = pkgs.nixUnstable;
-    extraOptions = ''
-      experimental-features = nix-command flakes
-    '';
-
-    binaryCaches = [
-      "https://alarsyo.cachix.org"
-    ];
-    binaryCachePublicKeys = [
-      "alarsyo.cachix.org-1:A6BmcaJek5+ZDWWv3fPteHhPm6U8liS9CbDbmegPfmk="
-    ];
-
-    gc = {
-      automatic = true;
-      dates = "03:15";
-      options = "--delete-older-than 30d";
-    };
-  };
 }