Try this

.gitea/workflows/deploy.yml

@@ -0,0 +1,30 @@
+name: Deploy Hashel
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@v31
+        with:
+          extra_nix_config: |
+            experimental-features = nix-command flakes
+
+      - name: Configure SSH
+        run: |
+          mkdir -p ~/.ssh
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          ssh-keyscan -H haschel >> ~/.ssh/known_hosts 2>/dev/null || true
+
+      - name: Deploy with deploy-rs
+        run: |
+          nix run github:serokell/deploy-rs -- .#haschel --skip-checks

flake.nix

@@ -3,9 +3,10 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
+    deploy-rs.url = "github:serokell/deploy-rs";
   };
 
-  outputs = { self, nixpkgs, ... }@inputs:
+  outputs = { self, nixpkgs, deploy-rs, ... }@inputs:
     let
       settings = import ./settings.nix;
       system = "x86_64-linux";
@@ -17,5 +18,16 @@
         ./configuration.nix
       ];
     };
+
+    deploy.nodes."${settings.hostname}" = {
+      hostname = "haschel";
+      sshUser = "root";
+      profiles.system = {
+        user = "root";
+        path = deploy-rs.lib.${system}.activate.nixos self.nixosConfigurations."${settings.hostname}";
+      };
+    };
+
+    checks = builtins.mapAttrs (system: deployLib: deployLib.deployChecks self.deploy) deploy-rs.lib;
   };
 }