diff --git a/.github/workflows/nixos.yml b/.github/workflows/nixos.yml
index 9ca6290..c297f79 100644
--- a/.github/workflows/nixos.yml
+++ b/.github/workflows/nixos.yml
@@ -6,10 +6,25 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.2
 
+      - name: Free Disk Space (Ubuntu)
+        uses: jlumbroso/free-disk-space@main
+        with:
+          # this might remove tools that are actually needed,
+          # if set to "true" but frees about 6 GB
+          tool-cache: true
+          
+          # all of these default to true, but feel free to set to
+          # "false" if necessary for your workflow
+          android: true
+          dotnet: true
+          haskell: true
+          large-packages: true
+          swap-storage: true
+
       - name: "Install Nix ❄️"
         uses: cachix/install-nix-action@v15
 
diff --git a/nixos/common/default.nix b/nixos/common/default.nix
index 8c082a0..4b4bbf7 100644
--- a/nixos/common/default.nix
+++ b/nixos/common/default.nix
@@ -27,6 +27,7 @@
         "https://nixpkgs-review-bot.cachix.org"
         "https://colmena.cachix.org"
         "https://hyprland.cachix.org"
+        "https://0x76-infra.cachix.org"
       ];
       trusted-public-keys = [
         "cachix.cachix.org-1:eWNHQldwUO7G2VkjpnjDbWwy4KQ/HNxht7H4SSoMckM="
@@ -34,6 +35,7 @@
         "nixpkgs-review-bot.cachix.org-1:eppgiDjPk7Hkzzz7XlUesk3rcEHqNDozGOrcLc8IqwE="
         "colmena.cachix.org-1:7BzpDnjjH8ki2CT3f6GdOk7QAzPOl+1t3LvTLXqYcSg="
         "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
+        "0x76-infra.cachix.org-1:dC1qp+VEN3jj5pdK4URlXR9hf3atT+MnpKGu6PZjMc8="
       ];
     # Also use zsh for root;
     };