diff --git a/flake.lock b/flake.lock
index a375469..64ee614 100644
--- a/flake.lock
+++ b/flake.lock
@@ -249,6 +249,24 @@
         "type": "github"
       }
     },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1681202837,
+        "narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "cfacdce06f30d2b68473a46042957675eebb3401",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "format-all": {
       "flake": false,
       "locked": {
@@ -273,11 +291,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1683762874,
-        "narHash": "sha256-EC7EDhzz/HjKppcaJFePlCOZqfVg8fooO/aWWUxwAJU=",
+        "lastModified": 1684596126,
+        "narHash": "sha256-4RZZmygeEXpuBqEXGs38ZAcWjWKGwu13Iqbxub6wuJk=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "010c26987729d6a2e0e19da6df7c3f0465ae03b3",
+        "rev": "27ef11f0218d9018ebb2948d40133df2b1de622d",
         "type": "github"
       },
       "original": {
@@ -384,11 +402,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1683408522,
-        "narHash": "sha256-9kcPh6Uxo17a3kK3XCHhcWiV1Yu1kYj22RHiymUhMkU=",
+        "lastModified": 1684570954,
+        "narHash": "sha256-FX5y4Sm87RWwfu9PI71XFvuRpZLowh00FQpIJ1WfXqE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "897876e4c484f1e8f92009fd11b7d988a121a4e7",
+        "rev": "3005f20ce0aaa58169cdee57c8aa12e5f1b6e1b3",
         "type": "github"
       },
       "original": {
@@ -398,6 +416,22 @@
       }
     },
     "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1681358109,
+        "narHash": "sha256-eKyxW4OohHQx9Urxi7TQlFBTDWII+F+x2hklDOQPB50=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "96ba1c52e54e74c3197f4d43026b3f3d92e83ff9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_4": {
       "locked": {
         "lastModified": 1679793451,
         "narHash": "sha256-JafTtgMDATE8dZOImBhWMA9RCn9AP8FVOpN+9K/tTlg=",
@@ -532,6 +566,7 @@
         "home-manager": "home-manager",
         "nix-doom-emacs": "nix-doom-emacs",
         "nixpkgs": "nixpkgs_2",
+        "rust-overlay": "rust-overlay",
         "stylix": "stylix"
       }
     },
@@ -551,6 +586,25 @@
         "type": "github"
       }
     },
+    "rust-overlay": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs_3"
+      },
+      "locked": {
+        "lastModified": 1684549120,
+        "narHash": "sha256-YlsvaWQtRui3OI9EAm4upXIxI4f0TYiv08TBN+WeFm8=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "f7c0c7f4b0780f977808de0bc0475ab044d3fd08",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
     "sln-mode": {
       "flake": false,
       "locked": {
@@ -572,14 +626,14 @@
         "base16": "base16",
         "flake-compat": "flake-compat_2",
         "home-manager": "home-manager_2",
-        "nixpkgs": "nixpkgs_3"
+        "nixpkgs": "nixpkgs_4"
       },
       "locked": {
-        "lastModified": 1683100629,
-        "narHash": "sha256-c+cHSnwkWYJNydJJYo0vS1uy/NoLW4OAkQZsxRl4WCY=",
+        "lastModified": 1684579323,
+        "narHash": "sha256-9YL2581CnrIOMMCRFXjfZeUPOvZN7+7Q4BhgXq5Imwo=",
         "owner": "danth",
         "repo": "stylix",
-        "rev": "a9367cea1bdc0ad35b3b0b2afc4aa9cf94cdecdb",
+        "rev": "cd9e19daa104c7f49fdc571b9cf8c9d76dd1b3ba",
         "type": "github"
       },
       "original": {
@@ -603,6 +657,21 @@
         "type": "github"
       }
     },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
     "ts-fold": {
       "flake": false,
       "locked": {
diff --git a/user/app/terminal/alacritty.nix b/user/app/terminal/alacritty.nix
index bc89710..451f0d9 100644
--- a/user/app/terminal/alacritty.nix
+++ b/user/app/terminal/alacritty.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
 {
   home.packages = with pkgs; [
@@ -6,6 +6,6 @@
   ];
   programs.alacritty.enable = true;
   programs.alacritty.settings = {
-    window.opacity = 0.9;
+    window.opacity = lib.mkForce 0.9;
   };
 }
diff --git a/user/app/terminal/kitty.nix b/user/app/terminal/kitty.nix
index 700882d..a2791b0 100644
--- a/user/app/terminal/kitty.nix
+++ b/user/app/terminal/kitty.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
 {
   home.packages = with pkgs; [
@@ -6,6 +6,6 @@
   ];
   programs.kitty.enable = true;
   programs.kitty.settings = {
-    background_opacity = "0.9";
+    background_opacity = lib.mkForce "0.9";
   };
 }