diff --git a/flake.lock b/flake.lock
index 397532f..e1c84df 100644
--- a/flake.lock
+++ b/flake.lock
@@ -105,15 +105,16 @@
         ]
       },
       "locked": {
-        "lastModified": 1772846660,
-        "narHash": "sha256-BX9ZWoUvpamj2CJpQqqEnpjci1BukYd71UFdj5JXn8c=",
+        "lastModified": 1772870050,
+        "narHash": "sha256-il+K3xjwpb68ojPNt5yEF+TqTHWAiIBaXU0QMhw5ek8=",
         "owner": "cry128",
         "repo": "cerulean",
-        "rev": "d9432d87a460c4f6dfb2602bba7e98267c2a0132",
+        "rev": "7bd81f84e6c0c47e62e3498508e018d2a1a8c7e4",
         "type": "github"
       },
       "original": {
         "owner": "cry128",
+        "ref": "bleeding",
         "repo": "cerulean",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index eb592da..cd28d3d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,7 +16,7 @@
     nt.url = "git+https://tearforge.net/cry/nt";
 
     cerulean = {
-      url = "github:cry128/cerulean";
+      url = "github:cry128/cerulean/bleeding";
       inputs = {
         nt.follows = "nt";
         systems.follows = "systems";
diff --git a/nixpkgs.nix b/nixpkgs.nix
index 15c127a..c7c2e70 100644
--- a/nixpkgs.nix
+++ b/nixpkgs.nix
@@ -1,11 +1,15 @@
 {
   lib,
   inputs,
-  system,
   ...
 } @ args: {
-  nixpkgs.channels = {
-    default = {
+  nixpkgs.channels = rec {
+    # base
+    base = npkgs;
+
+    # nixpkgs-stable
+    npkgs = {
+      source = inputs.nixpkgs;
       overlays = [
         inputs.dobutterfliescry-net.overlays.default
         (import ./overlays args)
@@ -29,10 +33,8 @@
 
     # nixpkgs-unstable
     upkgs = {
-      inherit system;
       source = inputs.nixpkgs-unstable;
       overlays = [
-        inputs.dobutterfliescry-net.overlays.default
         inputs.millennium.overlays.default
         (import ./overlays args)
       ];
@@ -44,7 +46,6 @@
 
     # nixpkgs-master
     mpkgs = {
-      inherit system;
       source = inputs.nixpkgs-master;
       overlays = [];
       config = {