diff --git a/flake.lock b/flake.lock
index fa02be9..28d9bf0 100644
--- a/flake.lock
+++ b/flake.lock
@@ -74,11 +74,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1736373539,
-        "narHash": "sha256-dinzAqCjenWDxuy+MqUQq0I4zUSfaCvN9rzuCmgMZJY=",
+        "lastModified": 1739757849,
+        "narHash": "sha256-Gs076ot1YuAAsYVcyidLKUMIc4ooOaRGO0PqTY7sBzA=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "bd65bc3cde04c16755955630b344bc9e35272c56",
+        "rev": "9d3d080aec2a35e05a15cedd281c2384767c2cfe",
         "type": "github"
       },
       "original": {
@@ -211,11 +211,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1739446958,
-        "narHash": "sha256-+/bYK3DbPxMIvSL4zArkMX0LQvS7rzBKXnDXLfKyRVc=",
+        "lastModified": 1740828860,
+        "narHash": "sha256-cjbHI+zUzK5CPsQZqMhE3npTyYFt9tJ3+ohcfaOF/WM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "2ff53fe64443980e139eaa286017f53f88336dd0",
+        "rev": "303bd8071377433a2d8f76e684ec773d70c5b642",
         "type": "github"
       },
       "original": {
@@ -243,11 +243,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1739484910,
-        "narHash": "sha256-wjWLzdM7PIq4ZAe7k3vyjtgVJn6b0UeodtRFlM/6W5U=",
+        "lastModified": 1740865531,
+        "narHash": "sha256-h00vGIh/jxcGl8aWdfnVRD74KuLpyY3mZgMFMy7iKIc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "0b73e36b1962620a8ac551a37229dd8662dac5c8",
+        "rev": "5ef6c425980847c78a80d759abc476e941a9bf42",
         "type": "github"
       },
       "original": {
diff --git a/home/alacritty.nix b/home/alacritty.nix
index 692a53d..bc51022 100644
--- a/home/alacritty.nix
+++ b/home/alacritty.nix
@@ -19,7 +19,7 @@
         decorations = "none"; # full/none/transparent/buttonless
 
         # Transparency:
-        opacity = 0.95;
+        opacity = lib.mkDefault 0.95;
       };
 
       scrolling = {