rename /cerulean -> /nix

nix/default.nix

@@ -0,0 +1,36 @@
+# Copyright 2025-2026 _cry64 (Emile Clark-Boman)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+{
+  mix,
+  inputs,
+  ...
+} @ args:
+mix.newMixture args (mixture: {
+  submods.public = [
+    ./snow
+  ];
+
+  version = "0.2.6-alpha";
+
+  overlays = [
+    # build deploy-rs as a package not from the flake input,
+    # hence we can rely on a nixpkg binary cache.
+    inputs.deploy-rs.overlays.default
+  ];
+
+  nixosModules = rec {
+    default = cerulean;
+    cerulean = ./nixos;
+  };
+})