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_check.yaml b/.woodpecker/cargo_check.yaml
index 557ee6c..fe50deb 100644
--- a/.woodpecker/cargo_check.yaml
+++ b/.woodpecker/cargo_check.yaml
@@ -3,7 +3,10 @@ when:
 
 steps:
   - name: "Run cargo check"
-    image: docker.nix-community.org/nixpkgs/nix-flakes
+    image: nixos/nix
     commands:
-      - nix shell github:nixos/nixpkgs/nixos-unstable#cargo github:nixos/nixpkgs/nixos-unstable#gcc
+      - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
+      - nix develop --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt
       - cargo check --workspace --all-targets
+    volumes:
+      - /nix:/mnt/nix:ro
diff --git a/.woodpecker/cargo_clippy.yaml b/.woodpecker/cargo_clippy.yaml
index dd4c38e..9c9e998 100644
--- a/.woodpecker/cargo_clippy.yaml
+++ b/.woodpecker/cargo_clippy.yaml
@@ -3,7 +3,10 @@ when:
 
 steps:
   - name: "Run cargo clippy"
-    image: docker.nix-community.org/nixpkgs/nix-flakes
+    image: nixos/nix
     commands:
-      - nix shell github:nixos/nixpkgs/nixos-unstable#clippy github:nixos/nixpkgs/nixos-unstable#cargo github:nixos/nixpkgs/nixos-unstable#gcc
+      - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
+      - nix develop --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt
       - cargo clippy
+    volumes:
+      - /nix:/mnt/nix:ro
diff --git a/.woodpecker/cargo_test.yaml b/.woodpecker/cargo_test.yaml
index 6c5d3fb..997358e 100644
--- a/.woodpecker/cargo_test.yaml
+++ b/.woodpecker/cargo_test.yaml
@@ -3,7 +3,10 @@ when:
 
 steps:
   - name: "Run cargo test"
-    image: docker.nix-community.org/nixpkgs/nix-flakes
+    image: nixos/nix
     commands:
-      - nix shell github:nixos/nixpkgs/nixos-unstable#cargo github:nixos/nixpkgs/nixos-unstable#gcc
+      - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
+      - nix develop --store unix:///mnt/nix/var/nix/daemon-socket/socket?root=/mnt
       - cargo test --workspace --all-targets
+    volumes:
+      - /nix:/mnt/nix:ro
diff --git a/.woodpecker/check_fmt.yaml b/.woodpecker/check_fmt.yaml
index 5e95d46..33cd34e 100644
--- a/.woodpecker/check_fmt.yaml
+++ b/.woodpecker/check_fmt.yaml
@@ -3,6 +3,9 @@ when:
 
 steps:
   - name: "Run treefmt"
-    image: docker.nix-community.org/nixpkgs/nix-flakes
+    image: nixos/nix
     commands:
-      - nix fmt -- --fail-on-change
+      - 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
+    volumes:
+      - /nix:/mnt/nix:ro
diff --git a/flake.lock b/flake.lock
index a691adf..7cfad76 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1742889210,
-        "narHash": "sha256-hw63HnwnqU3ZQfsMclLhMvOezpM7RSB0dMAtD5/sOiw=",
+        "lastModified": 1743827369,
+        "narHash": "sha256-rpqepOZ8Eo1zg+KJeWoq1HAOgoMCDloqv5r2EAa9TSA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "698214a32beb4f4c8e3942372c694f40848b360d",
+        "rev": "42a1c966be226125b48c384171c44c651c236c22",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index c90bed3..7cabc64 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,6 +26,7 @@
               nodejs
               cargo
               clippy
+              gcc
             ];
           };
         }
@@ -79,6 +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 (