diff --git a/.woodpecker/build_backend.yaml b/.woodpecker/build_backend.yaml
new file mode 100644
index 0000000..9471e62
--- /dev/null
+++ b/.woodpecker/build_backend.yaml
@@ -0,0 +1,11 @@
+when:
+  - event: pull_request
+
+steps:
+  - name: "Run cargo test"
+    image: nixos/nix
+    commands:
+      - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
+      - nix build --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt .#backend
+    volumes:
+      - /nix:/mnt/nix:ro
diff --git a/.woodpecker/cargo_clippy.yaml b/.woodpecker/cargo_clippy.yaml
index 860530a..9c9e998 100644
--- a/.woodpecker/cargo_clippy.yaml
+++ b/.woodpecker/cargo_clippy.yaml
@@ -3,7 +3,7 @@ when:
 
 steps:
   - name: "Run cargo clippy"
-    image: docker.nix-community.org/nixpkgs/nix-flakes
+    image: nixos/nix
     commands:
       - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
       - nix develop --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt
diff --git a/.woodpecker/cargo_test.yaml b/.woodpecker/cargo_test.yaml
index b8fdb8f..997358e 100644
--- a/.woodpecker/cargo_test.yaml
+++ b/.woodpecker/cargo_test.yaml
@@ -3,7 +3,7 @@ when:
 
 steps:
   - name: "Run cargo test"
-    image: docker.nix-community.org/nixpkgs/nix-flakes
+    image: nixos/nix
     commands:
       - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
       - nix develop --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt
diff --git a/.woodpecker/check_fmt.yaml b/.woodpecker/check_fmt.yaml
index b575b8b..33cd34e 100644
--- a/.woodpecker/check_fmt.yaml
+++ b/.woodpecker/check_fmt.yaml
@@ -3,7 +3,7 @@ when:
 
 steps:
   - name: "Run treefmt"
-    image: docker.nix-community.org/nixpkgs/nix-flakes
+    image: nixos/nix
     commands:
       - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
       - nix fmt --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt -- --fail-on-change
diff --git a/flake.nix b/flake.nix
index 80217dd..7cabc64 100644
--- a/flake.nix
+++ b/flake.nix
@@ -80,6 +80,28 @@
               };
             };
           };
+          backend = pkgs.rustPlatform.buildRustPackage rec {
+            pname = "backend";
+            version = "0.1";
+
+            src = pkgs.lib.fileset.toSource {
+              root = ./.;
+              fileset = pkgs.lib.fileset.unions [
+                ./Cargo.lock
+                ./Cargo.toml
+                ./crates
+                ./.cargo
+              ];
+            };
+
+            cargoLock = {
+              lockFile = ./Cargo.lock;
+            };
+
+            meta = {
+              mainProgram = "backend";
+            };
+          };
         }
       );
       formatter = forSystems (