diff --git a/.gitea/workflows/check-flake.yaml b/.gitea/workflows/check-flake.yaml
index 42ee8f6..f2006cf 100644
--- a/.gitea/workflows/check-flake.yaml
+++ b/.gitea/workflows/check-flake.yaml
@@ -10,8 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     container: ubuntu:latest
     steps:
-      - name: Install sudo
-        run: apt-get update && apt-get install -y --no-install-recommends sudo curl ca-certificates
+      - name: Install basic dependencies
+        run: apt-get update && apt-get install -y --no-install-recommends sudo curl ca-certificates xz
 
       - name: Install Nix
         uses: https://github.com/cachix/install-nix-action@v20