bump unstable and add nixpkgs 25.11 channel (#178)

Why
===
* A [new stable NixOS version was
released](https://nixos.org/manual/nixos/stable/release-notes.html#sec-release-25.11)
* nixpkgs-unstable should be kept up to date

What changed
===
* bumped nixpkgs-unstable to latest
* ran ./add.sh 25.11
* set default channel to nixpkgs-25.11

Test plan
===
* CI builds for 25.11

Author: vlinkz

.semaphore/semaphore.yml

@@ -55,6 +55,7 @@ blocks:
                 - nixpkgs-24.05
                 - nixpkgs-24.11
                 - nixpkgs-25.05
+                - nixpkgs-25.11
                 - nixpkgs-unstable
           commands:
             - mkdir /tmp/$NIXPKGS_CHANNEL
@@ -155,3 +156,12 @@ promotions:
           default_value: nixpkgs-25.05
           description: Which channel to update?
           name: NIXPKGS_CHANNEL
+
+  - name: Push nixpkgs-25.11 to GCS
+    pipeline_file: push.yml
+    parameters:
+      env_vars:
+        - required: true
+          default_value: nixpkgs-25.11
+          description: Which channel to update?
+          name: NIXPKGS_CHANNEL

build.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-default=nixpkgs-25.05
+default=nixpkgs-25.11
 channel=$default
 
 function error() {

default.nix

@@ -1,5 +1,5 @@
 { sources ? import nix/sources.nix
-, channelName ? "nixpkgs-25.05"
+, channelName ? "nixpkgs-25.11"
 , channel ? sources.${channelName}
 , system ? "x86_64-linux"
 , config ? { }

hydra/release-25.11.nix

@@ -0,0 +1,13 @@
+{}:
+
+let
+  sources = import ../nix/sources.nix;
+  pkgs = import ../default.nix {
+    sources = sources;
+    channel = sources."nixpkgs-25.11";
+  };
+in
+{
+  inherit (pkgs) replitPackages;
+  inherit (pkgs.nodePackages) typescript-language-server yarn prettier svelte-language-server;
+}

nix/sources.json

@@ -107,6 +107,18 @@
         "url": "https://github.com/nixos/nixpkgs/archive/650e572363c091045cdbc5b36b0f4c1f614d3058.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
+    "nixpkgs-25.11": {
+        "branch": "nixos-25.11",
+        "description": "Nix Packages collection & NixOS",
+        "homepage": "",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "fa56d7d6de78f5a7f997b0ea2bc6efd5868ad9e8",
+        "sha256": "0d8xd2rk1phikz7icawxkbdsg8yc5c71hs5aln0kg9hj73f50kaz",
+        "type": "tarball",
+        "url": "https://github.com/nixos/nixpkgs/archive/fa56d7d6de78f5a7f997b0ea2bc6efd5868ad9e8.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
     "nixpkgs-legacy": {
         "description": "Nix Packages collection",
         "homepage": "",
@@ -124,10 +136,10 @@
         "homepage": "",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "650e572363c091045cdbc5b36b0f4c1f614d3058",
-        "sha256": "150ip7d1izr4falxvnidgjmisbfja17rp4afigigld2hlhndafm7",
+        "rev": "ac055f38c798b0d87695240c7b761b82fc7e5bc2",
+        "sha256": "1h50qndal9bjwc30sqa9h6169a5x109gfg1chpxpqf4kfn9yvd5n",
         "type": "tarball",
-        "url": "https://github.com/nixos/nixpkgs/archive/650e572363c091045cdbc5b36b0f4c1f614d3058.tar.gz",
+        "url": "https://github.com/nixos/nixpkgs/archive/ac055f38c798b0d87695240c7b761b82fc7e5bc2.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "prybar": {

update.sh

@@ -8,3 +8,4 @@ nix-shell -p niv --run 'niv update nixpkgs-23.11 -b nixos-23.11'
 nix-shell -p niv --run 'niv update nixpkgs-24.05 -b nixos-24.05'
 nix-shell -p niv --run 'niv update nixpkgs-24.11 -b nixos-24.11'
 nix-shell -p niv --run 'niv update nixpkgs-25.05 -b nixos-25.05'
+nix-shell -p niv --run 'niv update nixpkgs-25.11 -b nixos-25.11'