Add oxalica overlay

common.nix

@@ -1,6 +1,7 @@
-# Holds common settings for all systems.
+# Holds common settings for *all* systems, including both servers and
+# clients.
 
-{ ... }: {
+{ pkgs, oxalica, ... }: {
 
     nix = {
         optimise.automatic = true;
@@ -11,9 +12,26 @@
 
     nixpkgs = {
         config = { allowUnfree = true; };
-        overlays = [ (import ./overlays) ];
+        overlays = [
+
+            # Import overlays defined under the `overlays/` directory.
+            (import ./overlays)
+
+            # Clients need Rust for development, servers need Rust for
+            # deployment.
+            oxalica.overlay
+            
+        ];
     };
 
     boot.cleanTmpDir = true;
 
+    environment.systemPackages = [
+
+        # Include common packages I use everywhere, like `rg`
+        # and `exa`
+        (import ./env.nix { inherit pkgs; })
+
+    ];
+
 }

flake.lock

@@ -1,5 +1,20 @@
 {
   "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1637014545,
+        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": "nixpkgs"
@@ -48,10 +63,46 @@
         "type": "github"
       }
     },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1637453606,
+        "narHash": "sha256-Gy6cwUswft9xqsjWxFYEnx/63/qzaFUwatcbV5GF/GQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "8afc4e543663ca0a6a4f496262cd05233737e732",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "oxalica": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs_3"
+      },
+      "locked": {
+        "lastModified": 1653273659,
+        "narHash": "sha256-dHXYaNL1axhZZyiZXxt1WKhvZrYXq7bjCs3y5VjgyGI=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "0fa3e01da1ce98e3b40063b8e2678095943402b1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "home-manager": "home-manager",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_2",
+        "oxalica": "oxalica"
       }
     }
   },

flake.nix

@@ -2,20 +2,27 @@
 
     inputs = {
 
+        # Living on the edge
         nixpkgs = {
             url = github:NixOS/nixpkgs/nixos-unstable;
         };
 
+        # Used for managing dotfiles
         home-manager = {
             url = github:nix-community/home-manager;
         };
 
+        # Rust overlay, for Rust development
+        oxalica = {
+            url = github:oxalica/rust-overlay;
+        };
+
     };
 
     outputs = args: with args.nixpkgs; {
         nixosConfigurations = {
 
-			# Desktop
+            # Desktop client
             "thor" = lib.nixosSystem {
                 system = "x86_64-linux";
                 modules = [
@@ -25,7 +32,7 @@
                 specialArgs = args;
             };
 
-            # Laptop
+            # Dell XPS laptop client
             "loki" = lib.nixosSystem {
                 system = "x86_64-linux";
                 modules = [

modules/default.nix

@@ -36,8 +36,6 @@ let themeType =
             };
         };
 
-	utils = import ../env.nix { inherit pkgs; };
-
 in {
 
     options.riley = with lib; {
@@ -136,9 +134,6 @@ in {
             curl
             git
 
-            # Common utils (rg, sk, fd, etc.)
-            utils
-
         ];
 
         environment.shellAliases = {