diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 68e89c31c..216be7299 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -26,6 +26,17 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v5
+      - name: Free Disk Space (Ubuntu)
+        if: runner.os == 'Linux'
+        uses: jlumbroso/free-disk-space@main
+        with:
+          tool-cache: false
+          android: true
+          dotnet: true
+          haskell: true
+          large-packages: true
+          docker-images: true
+          swap-storage: true
       - name: KVM Linux Virtualization
         if: runner.os == 'Linux'
         run: |
diff --git a/Makefile b/Makefile
index 9432e1770..be17cbc8e 100644
--- a/Makefile
+++ b/Makefile
@@ -211,7 +211,7 @@ nix-build: nix-connect
 		if [ "$(OS)" = "Darwin" ]; then \
 			$(NIX_ALLOW_UNFREE) $(NIX_EXEC) build .#$(NIX_CONFIG_TYPE).runner.system $(NIX_FLAGS) --impure --no-update-lock-file --show-trace; \
 		elif [ "$(NIX_CONFIG_TYPE)" = "nixosConfigurations" ]; then \
-			$(NIX_ALLOW_UNFREE) $(NIX_EXEC) run $(NIX_FLAGS) nixpkgs#nixos-rebuild -- build --flake .#runner --impure --no-update-lock-file; \
+			$(NIX_ALLOW_UNFREE) $(NIX_EXEC) build .#nixosConfigurations.runner.config.system.build.toplevel $(NIX_FLAGS) --impure --no-update-lock-file --show-trace; \
 		elif [ "$(NIX_CONFIG_TYPE)" = "homeConfigurations" ]; then \
 			$(NIX_ALLOW_UNFREE) $(NIX_EXEC) build .#$(NIX_CONFIG_TYPE)."$(NIX_USERNAME)@$(NIX_SYSTEM)".activationPackage $(NIX_FLAGS) --impure --no-update-lock-file --show-trace; \
 		else \
diff --git a/home-manager/default.nix b/home-manager/default.nix
index 399fca27a..92a399dc7 100644
--- a/home-manager/default.nix
+++ b/home-manager/default.nix
@@ -31,12 +31,16 @@ in
       inputs.agenix.homeManagerModules.default
     ];
 
-  nixpkgs.config.allowUnfreePredicate =
-    pkg:
-    builtins.elem (lib.getName pkg) [
-      "claude-code"
-      "qwen-code"
-    ];
+  nixpkgs.config = {
+    allowUnfree = true;
+    allowUnfreePredicate =
+      pkg:
+      builtins.elem (lib.getName pkg) [
+        "claude-code"
+        "qwen-code"
+        "crush"
+      ];
+  };
 
   home.username = username;
   home.homeDirectory = lib.mkIf pkgs.stdenv.isLinux "/home/${username}";
diff --git a/hosts/nixos/default.nix b/hosts/nixos/default.nix
index a52efbe3d..f26549572 100644
--- a/hosts/nixos/default.nix
+++ b/hosts/nixos/default.nix
@@ -7,7 +7,10 @@
 let
   inherit (inputs) nixpkgs home-manager;
   system = "x86_64-linux";
-  pkgs = nixpkgs.legacyPackages.${system};
+  pkgs = import nixpkgs {
+    inherit system;
+    config.allowUnfree = true;
+  };
   configuration =
     { config, lib, ... }:
     {
@@ -104,7 +107,6 @@ nixpkgs.lib.nixosSystem {
         fsType = "ext4";
       };
 
-      nixpkgs.config.allowUnfree = true;
       nixpkgs.pkgs = pkgs;
 
       fonts.packages = with pkgs; [
@@ -118,7 +120,7 @@ nixpkgs.lib.nixosSystem {
       home-manager.users."${username}" = import ../../home-manager {
         inherit inputs username system;
         lib = nixpkgs.lib;
-        pkgs = nixpkgs.legacyPackages.${system};
+        pkgs = pkgs;
         config = { };
       };
     }