update(flake): switch nixpkgs-unstable input to flake-compatible channel tarballs

flake.lock

@@ -17,23 +17,6 @@
         "url": "https://git.finally.coffee/transcaffeine/dotfiles.git"
       }
     },
-    "dotfiles-local": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1743949278,
-        "narHash": "sha256-ntNJXtq3Gw+7ssEgLzoKAiuSS6QXaCwK6k/KSLlqBwo=",
-        "ref": "main",
-        "rev": "6e1d7df5b569f2eb98759e1ca77a06556c5bd1dd",
-        "revCount": 10,
-        "type": "git",
-        "url": "https://git.finally.coffee/transcaffeine/dotfiles"
-      },
-      "original": {
-        "ref": "main",
-        "type": "git",
-        "url": "https://git.finally.coffee/transcaffeine/dotfiles"
-      }
-    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -72,18 +55,15 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1757020766,
-        "narHash": "sha256-PLoSjHRa2bUbi1x9HoXgTx2AiuzNXs54c8omhadyvp0=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "fe83bbdde2ccdc2cb9573aa846abe8363f79a97a",
-        "type": "github"
+        "lastModified": 1760105160,
+        "narHash": "sha256-oYYalpFIVeDolg/zpkPkKk8mBuvnj/lUE3/K7OuTOwk=",
+        "rev": "5da4a26309e796daa7ffca72df93dbe53b8164c7",
+        "type": "tarball",
+        "url": "https://releases.nixos.org/nixos/25.05/nixos-25.05.810995.5da4a26309e7/nixexprs.tar.xz"
       },
       "original": {
-        "owner": "NixOS",
-        "ref": "nixos-25.05",
-        "repo": "nixpkgs",
-        "type": "github"
+        "type": "tarball",
+        "url": "https://channels.nixos.org/nixos-25.05/nixexprs.tar.xz"
       }
     },
     "nixpkgs-forked": {
@@ -119,24 +99,20 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1757236331,
-        "narHash": "sha256-zf1HPzatARa8PFLS7ypOxx2IVpbAWotKYl8Kgu4DYyw=",
-        "owner": "nixOS",
-        "repo": "nixpkgs",
-        "rev": "1f46efd9d12bc85e195f4d17aacc372a88a277a5",
-        "type": "github"
+        "lastModified": 1760252326,
+        "narHash": "sha256-5v32B25kSE++E+KtP4DO687r/AlWL9qOlOjtYyfcDSw=",
+        "rev": "66e5020bfe0af40ffa127426f8405edbdadbb40b",
+        "type": "tarball",
+        "url": "https://releases.nixos.org/nixos/unstable-small/nixos-25.11pre876242.66e5020bfe0a/nixexprs.tar.xz"
       },
       "original": {
-        "owner": "nixOS",
-        "ref": "master",
-        "repo": "nixpkgs",
-        "type": "github"
+        "type": "tarball",
+        "url": "https://channels.nixos.org/nixos-unstable-small/nixexprs.tar.xz"
       }
     },
     "root": {
       "inputs": {
         "dotfiles": "dotfiles",
-        "dotfiles-local": "dotfiles-local",
         "home-manager": "home-manager",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs",

flake.nix

@@ -1,7 +1,7 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
-    nixpkgs-unstable.url = "github:nixOS/nixpkgs/master";
+    nixpkgs.url = "https://channels.nixos.org/nixos-25.05/nixexprs.tar.xz";
+    nixpkgs-unstable.url = "https://channels.nixos.org/nixos-unstable-small/nixexprs.tar.xz";
     nixpkgs-forked.url = "github:transcaffeine/nixpkgs/nexus/3.81.1";
     nixpkgs-local = {
       url = "git+file:/home/transcaffeine/git/transcaffeine/nixpkgs";
@@ -15,10 +15,6 @@
       url = "git+https://git.finally.coffee/transcaffeine/dotfiles.git?ref=main";
       flake = false;
     };
-    dotfiles-local = {
-      url = "git+file:/home/transcaffeine/git/transcaffeine/dotfiles";
-      flake = false;
-    };
   };
 
   outputs = inputs @ { self, nixpkgs, nixpkgs-unstable, ... }: {