diff --git a/.envrc b/.envrc
index 1d67506..65f365c 100644
--- a/.envrc
+++ b/.envrc
@@ -1,5 +1,5 @@
 if has nix_direnv_version; then
-  use flake
+  use flake ./nix/dev
 fi
 
 dotenv_if_exists
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index d7afa64..2d4748d 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -27,7 +27,7 @@ jobs:
       - name: Build Docker image
         id: build
         run: |
-          nix build --print-build-logs .#container-${{ matrix.arch }}
+          nix build --print-build-logs ./nix/dev#container-${{ matrix.arch }}
           [ ! -L result ] && exit 1
           echo "path=$(readlink -f result)" >> "$GITHUB_OUTPUT"
 
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index f7fb3e6..e038910 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -48,4 +48,6 @@ jobs:
         uses: DeterminateSystems/magic-nix-cache-action@v4
 
       - name: Run checks
-        run: nix flake check --print-build-logs --show-trace
+        run: |
+          cd ./nix/dev
+          nix flake check --print-build-logs --show-trace
diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index e66c5de..c9931e2 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -8,21 +8,65 @@ on:
 
 jobs:
   update:
+    name: Run update
     runs-on: ubuntu-latest
 
     permissions:
       contents: write
       pull-requests: write
 
+    env:
+      PR_BRANCH: 'update-lockfiles'
+
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout repository
+        uses: actions/checkout@v4
 
       - name: Install Nix
-        uses: nixbuild/nix-quick-install-action@v27
+        uses: DeterminateSystems/nix-installer-action@v10
 
-      - name: Update and create PR
-        uses: DeterminateSystems/update-flake-lock@v21
-        with:
-          commit-msg: 'nix: update flake.lock'
-          pr-title: 'nix: update flake.lock'
-          token: ${{ github.token }}
+      - name: Set Git user info
+        run: |
+          git config user.name 'github-actions[bot]'
+          git config user.email 'github-actions[bot]@users.noreply.github.com'
+
+      - name: Create new branch
+        id: branch
+        run: |
+          git switch -c "$PR_BRANCH"
+
+      - name: Update flake inputs
+        run: |
+          pushd nix/dev
+          nix flake update \
+            --commit-lock-file \
+            --commit-lockfile-summary "nix: update dev flake.lock"
+          popd
+
+          nix flake update \
+            --commit-lock-file \
+            --commit-lockfile-summary "nix: update flake.lock"
+
+      - name: Make PR if needed
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          if ! git diff --color=always --exit-code origin/main; then
+            git fetch origin "$PR_BRANCH" || true
+            git push --force-with-lease -u origin "$PR_BRANCH"
+
+            open_prs="$(gh pr list --base main --head "$PR_BRANCH" | wc -l)"
+            if [ "$open_prs" -eq 0 ]; then
+              gh pr create \
+                --base main \
+                --head "$PR_BRANCH" \
+                --title "chore: update lockfiles" \
+                --fill
+            fi
+          fi
+
+      - name: Enable auto-merge
+        shell: bash
+        run: gh pr merge --auto --squash
+        env:
+          GH_TOKEN: ${{ secrets.MERGE_TOKEN }}
diff --git a/flake.lock b/flake.lock
index be76fcd..93b865c 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,64 +1,5 @@
 {
   "nodes": {
-    "flake-parts": {
-      "inputs": {
-        "nixpkgs-lib": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1709336216,
-        "narHash": "sha256-Dt/wOWeW6Sqm11Yh+2+t0dfEWxoMxGBvv3JpIocFl9E=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "f7b3c975cf067e56e7cda6cb098ebe3fb4d74ca2",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "type": "github"
-      }
-    },
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1710146030,
-        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "gitignore": {
-      "inputs": {
-        "nixpkgs": [
-          "pre-commit-hooks",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1709087332,
-        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1711715736,
@@ -75,119 +16,9 @@
         "type": "github"
       }
     },
-    "pre-commit-hooks": {
-      "inputs": {
-        "flake-compat": [],
-        "flake-utils": "flake-utils",
-        "gitignore": "gitignore",
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "nixpkgs-stable": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1711850184,
-        "narHash": "sha256-rs5zMkTO+AlVBzgOaskAtY4zix7q3l8PpawfznHotcQ=",
-        "owner": "cachix",
-        "repo": "pre-commit-hooks.nix",
-        "rev": "9fc61b5eb0e50fc42f1d358f5240722907b79726",
-        "type": "github"
-      },
-      "original": {
-        "owner": "cachix",
-        "repo": "pre-commit-hooks.nix",
-        "type": "github"
-      }
-    },
-    "procfile-nix": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1711158989,
-        "narHash": "sha256-exgncIe/lQIswv2L1M0y+RrHAg5dofLFCOxGu4/yJww=",
-        "owner": "getchoo",
-        "repo": "procfile-nix",
-        "rev": "6388308f9e9c8a8fbfdff54b30adf486fa292cf9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "getchoo",
-        "repo": "procfile-nix",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
-        "flake-parts": "flake-parts",
-        "nixpkgs": "nixpkgs",
-        "pre-commit-hooks": "pre-commit-hooks",
-        "procfile-nix": "procfile-nix",
-        "rust-overlay": "rust-overlay",
-        "treefmt-nix": "treefmt-nix"
-      }
-    },
-    "rust-overlay": {
-      "inputs": {
-        "flake-utils": [
-          "pre-commit-hooks",
-          "flake-utils"
-        ],
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1711851236,
-        "narHash": "sha256-EJ03x3N9ihhonAttkaCrqxb0djDq3URCuDpmVPbNZhA=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "f258266af947599e8069df1c2e933189270f143a",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "type": "github"
-      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
-    "treefmt-nix": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1711803027,
-        "narHash": "sha256-Qic3OvsVLpetchzaIe2hJqgliWXACq2Oee6mBXa/IZQ=",
-        "owner": "numtide",
-        "repo": "treefmt-nix",
-        "rev": "1810d51a015c1730f2fe05a255258649799df416",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "treefmt-nix",
-        "type": "github"
+        "nixpkgs": "nixpkgs"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 4685dde..e575b27 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,58 +1,31 @@
 {
   description = "Discord bot for Prism Launcher";
 
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
-    flake-parts = {
-      url = "github:hercules-ci/flake-parts";
-      inputs.nixpkgs-lib.follows = "nixpkgs";
-    };
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
 
-    pre-commit-hooks = {
-      url = "github:cachix/pre-commit-hooks.nix";
-      inputs = {
-        nixpkgs.follows = "nixpkgs";
-        nixpkgs-stable.follows = "nixpkgs";
-        flake-compat.follows = "";
-      };
-    };
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: let
+    systems = [
+      "x86_64-linux"
+      "aarch64-linux"
+      "x86_64-darwin"
+      "aarch64-darwin"
+    ];
 
-    procfile-nix = {
-      url = "github:getchoo/procfile-nix";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
+    forAllSystems = fn: nixpkgs.lib.genAttrs systems (system: fn nixpkgs.legacyPackages.${system});
+  in {
+    nixosModules.default = import ./nix/module.nix self;
 
-    rust-overlay = {
-      url = "github:oxalica/rust-overlay";
-      inputs = {
-        nixpkgs.follows = "nixpkgs";
-        flake-utils.follows = "pre-commit-hooks/flake-utils";
-      };
-    };
+    packages = forAllSystems (pkgs: rec {
+      refraction = pkgs.callPackage ./nix/derivation.nix {inherit self;};
+      default = refraction;
+    });
 
-    treefmt-nix = {
-      url = "github:numtide/treefmt-nix";
-      inputs.nixpkgs.follows = "nixpkgs";
+    overlays.default = _: prev: {
+      refraction = prev.callPackage ./nix/derivation.nix {inherit self;};
     };
   };
-
-  outputs = {flake-parts, ...} @ inputs:
-    flake-parts.lib.mkFlake {inherit inputs;} {
-      imports = [
-        ./nix/dev.nix
-        ./nix/packages.nix
-        ./nix/deployment
-
-        inputs.pre-commit-hooks.flakeModule
-        inputs.procfile-nix.flakeModule
-        inputs.treefmt-nix.flakeModule
-      ];
-
-      systems = [
-        "x86_64-linux"
-        "aarch64-linux"
-        "x86_64-darwin"
-        "aarch64-darwin"
-      ];
-    };
 }
diff --git a/nix/dev.nix b/nix/dev.nix
deleted file mode 100644
index 8826a28..0000000
--- a/nix/dev.nix
+++ /dev/null
@@ -1,69 +0,0 @@
-{
-  perSystem = {
-    lib,
-    pkgs,
-    config,
-    self',
-    ...
-  }: {
-    devShells.default = pkgs.mkShell {
-      shellHook = ''
-        ${config.pre-commit.installationScript}
-      '';
-
-      packages = with pkgs; [
-        # general
-        actionlint
-        nodePackages.prettier
-        config.procfiles.daemons.package
-
-        # rust
-        clippy
-        rustfmt
-        rust-analyzer
-
-        # nix
-        self'.formatter
-        deadnix
-        nil
-        statix
-      ];
-
-      inputsFrom = [self'.packages.refraction];
-      RUST_SRC_PATH = "${pkgs.rustPlatform.rustLibSrc}";
-    };
-
-    treefmt = {
-      projectRootFile = "flake.nix";
-
-      programs = {
-        alejandra.enable = true;
-        deadnix.enable = true;
-        prettier.enable = true;
-        rustfmt.enable = true;
-      };
-
-      settings.global = {
-        excludes = [
-          "./target"
-          "./flake.lock"
-          "./Cargo.lock"
-        ];
-      };
-    };
-
-    pre-commit.settings.hooks = {
-      actionlint.enable = true;
-      nil.enable = true;
-      statix.enable = true;
-      treefmt = {
-        enable = true;
-        package = config.treefmt.build.wrapper;
-      };
-    };
-
-    procfiles.daemons.processes = {
-      redis = lib.getExe' pkgs.redis "redis-server";
-    };
-  };
-}
diff --git a/nix/dev/args.nix b/nix/dev/args.nix
new file mode 100644
index 0000000..42b60e2
--- /dev/null
+++ b/nix/dev/args.nix
@@ -0,0 +1,11 @@
+{inputs, ...}: {
+  perSystem = {
+    lib,
+    system,
+    ...
+  }: {
+    _module.args = {
+      refraction' = lib.mapAttrs (lib.const (v: v.${system} or v)) (inputs.get-flake ../../.);
+    };
+  };
+}
diff --git a/nix/deployment/default.nix b/nix/dev/docker.nix
similarity index 76%
rename from nix/deployment/default.nix
rename to nix/dev/docker.nix
index 96eb6ee..f778070 100644
--- a/nix/deployment/default.nix
+++ b/nix/dev/docker.nix
@@ -1,14 +1,4 @@
-{
-  flake-parts-lib,
-  withSystem,
-  ...
-}: {
-  imports = [./static.nix];
-
-  flake.nixosModules.default = flake-parts-lib.importApply ./module.nix {
-    inherit withSystem;
-  };
-
+{withSystem, ...}: {
   perSystem = {
     lib,
     pkgs,
diff --git a/nix/dev/flake.lock b/nix/dev/flake.lock
new file mode 100644
index 0000000..8522cb4
--- /dev/null
+++ b/nix/dev/flake.lock
@@ -0,0 +1,212 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709336216,
+        "narHash": "sha256-Dt/wOWeW6Sqm11Yh+2+t0dfEWxoMxGBvv3JpIocFl9E=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "f7b3c975cf067e56e7cda6cb098ebe3fb4d74ca2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "get-flake": {
+      "locked": {
+        "lastModified": 1694475786,
+        "narHash": "sha256-s5wDmPooMUNIAAsxxCMMh9g68AueGg63DYk2hVZJbc8=",
+        "owner": "ursi",
+        "repo": "get-flake",
+        "rev": "ac54750e3b95dab6ec0726d77f440efe6045bec1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ursi",
+        "repo": "get-flake",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "pre-commit-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1711715736,
+        "narHash": "sha256-9slQ609YqT9bT/MNX9+5k5jltL9zgpn36DpFB7TkttM=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "807c549feabce7eddbf259dbdcec9e0600a0660d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "pre-commit-hooks": {
+      "inputs": {
+        "flake-compat": [],
+        "flake-utils": "flake-utils",
+        "gitignore": "gitignore",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "nixpkgs-stable": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1711850184,
+        "narHash": "sha256-rs5zMkTO+AlVBzgOaskAtY4zix7q3l8PpawfznHotcQ=",
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "rev": "9fc61b5eb0e50fc42f1d358f5240722907b79726",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "type": "github"
+      }
+    },
+    "procfile-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1711158989,
+        "narHash": "sha256-exgncIe/lQIswv2L1M0y+RrHAg5dofLFCOxGu4/yJww=",
+        "owner": "getchoo",
+        "repo": "procfile-nix",
+        "rev": "6388308f9e9c8a8fbfdff54b30adf486fa292cf9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "getchoo",
+        "repo": "procfile-nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "get-flake": "get-flake",
+        "nixpkgs": "nixpkgs",
+        "pre-commit-hooks": "pre-commit-hooks",
+        "procfile-nix": "procfile-nix",
+        "rust-overlay": "rust-overlay",
+        "treefmt-nix": "treefmt-nix"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "flake-utils": [
+          "pre-commit-hooks",
+          "flake-utils"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1711851236,
+        "narHash": "sha256-EJ03x3N9ihhonAttkaCrqxb0djDq3URCuDpmVPbNZhA=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "f258266af947599e8069df1c2e933189270f143a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1711803027,
+        "narHash": "sha256-Qic3OvsVLpetchzaIe2hJqgliWXACq2Oee6mBXa/IZQ=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "1810d51a015c1730f2fe05a255258649799df416",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/nix/dev/flake.nix b/nix/dev/flake.nix
new file mode 100644
index 0000000..0f99cb1
--- /dev/null
+++ b/nix/dev/flake.nix
@@ -0,0 +1,65 @@
+{
+  description = "Discord bot for Prism Launcher";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    flake-parts = {
+      url = "github:hercules-ci/flake-parts";
+      inputs.nixpkgs-lib.follows = "nixpkgs";
+    };
+
+    get-flake.url = "github:ursi/get-flake";
+
+    pre-commit-hooks = {
+      url = "github:cachix/pre-commit-hooks.nix";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+        nixpkgs-stable.follows = "nixpkgs";
+        flake-compat.follows = "";
+      };
+    };
+
+    procfile-nix = {
+      url = "github:getchoo/procfile-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+        flake-utils.follows = "pre-commit-hooks/flake-utils";
+      };
+    };
+
+    treefmt-nix = {
+      url = "github:numtide/treefmt-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = {flake-parts, ...} @ inputs:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      debug = true;
+      imports = [
+        ./args.nix
+        ./docker.nix
+        ./pre-commit.nix
+        ./procfiles.nix
+        ./shell.nix
+        ./static.nix
+        ./treefmt.nix
+
+        inputs.pre-commit-hooks.flakeModule
+        inputs.procfile-nix.flakeModule
+        inputs.treefmt-nix.flakeModule
+      ];
+
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+    };
+}
diff --git a/nix/dev/pre-commit.nix b/nix/dev/pre-commit.nix
new file mode 100644
index 0000000..39d6e9e
--- /dev/null
+++ b/nix/dev/pre-commit.nix
@@ -0,0 +1,20 @@
+{
+  perSystem = {
+    config,
+    lib,
+    ...
+  }: {
+    pre-commit.settings = {
+      rootSrc = lib.mkForce ../../.;
+      hooks = {
+        actionlint.enable = true;
+        nil.enable = true;
+        statix.enable = true;
+        treefmt = {
+          enable = true;
+          package = config.treefmt.build.wrapper;
+        };
+      };
+    };
+  };
+}
diff --git a/nix/dev/procfiles.nix b/nix/dev/procfiles.nix
new file mode 100644
index 0000000..c8c8c2e
--- /dev/null
+++ b/nix/dev/procfiles.nix
@@ -0,0 +1,11 @@
+{
+  perSystem = {
+    lib,
+    pkgs,
+    ...
+  }: {
+    procfiles.daemons.processes = {
+      redis = lib.getExe' pkgs.redis "redis-server";
+    };
+  };
+}
diff --git a/nix/dev/shell.nix b/nix/dev/shell.nix
new file mode 100644
index 0000000..e0adb94
--- /dev/null
+++ b/nix/dev/shell.nix
@@ -0,0 +1,36 @@
+{
+  perSystem = {
+    pkgs,
+    config,
+    self',
+    refraction',
+    ...
+  }: {
+    devShells.default = pkgs.mkShell {
+      shellHook = ''
+        ${config.pre-commit.installationScript}
+      '';
+
+      packages = with pkgs; [
+        # general
+        actionlint
+        nodePackages.prettier
+        config.procfiles.daemons.package
+
+        # rust
+        clippy
+        rustfmt
+        rust-analyzer
+
+        # nix
+        self'.formatter
+        deadnix
+        nil
+        statix
+      ];
+
+      inputsFrom = [refraction'.packages.refraction];
+      RUST_SRC_PATH = "${pkgs.rustPlatform.rustLibSrc}";
+    };
+  };
+}
diff --git a/nix/deployment/static.nix b/nix/dev/static.nix
similarity index 93%
rename from nix/deployment/static.nix
rename to nix/dev/static.nix
index 319d974..3a1c470 100644
--- a/nix/deployment/static.nix
+++ b/nix/dev/static.nix
@@ -3,7 +3,7 @@
     lib,
     pkgs,
     inputs',
-    self',
+    refraction',
     ...
   }: let
     targets = with pkgs.pkgsCross; {
@@ -26,7 +26,7 @@
       targets;
 
     buildWith = rustPlatform:
-      self'.packages.refraction.override {
+      refraction'.packages.refraction.override {
         inherit rustPlatform;
         optimizeSize = true;
       };
diff --git a/nix/dev/treefmt.nix b/nix/dev/treefmt.nix
new file mode 100644
index 0000000..13a1675
--- /dev/null
+++ b/nix/dev/treefmt.nix
@@ -0,0 +1,22 @@
+{
+  perSystem = {
+    treefmt = {
+      projectRootFile = ".git/config";
+
+      programs = {
+        alejandra.enable = true;
+        deadnix.enable = true;
+        prettier.enable = true;
+        rustfmt.enable = true;
+      };
+
+      settings.global = {
+        excludes = [
+          "./target"
+          "./flake.lock"
+          "./Cargo.lock"
+        ];
+      };
+    };
+  };
+}
diff --git a/nix/deployment/module.nix b/nix/module.nix
similarity index 95%
rename from nix/deployment/module.nix
rename to nix/module.nix
index ec39895..5572e4b 100644
--- a/nix/deployment/module.nix
+++ b/nix/module.nix
@@ -1,4 +1,4 @@
-{withSystem, ...}: {
+self: {
   config,
   lib,
   pkgs,
@@ -22,9 +22,7 @@
 in {
   options.services.refraction = {
     enable = mkEnableOption "refraction";
-    package = mkPackageOption (
-      withSystem pkgs.stdenv.hostPlatform.system ({self', ...}: self'.packages)
-    ) "refraction" {};
+    package = mkPackageOption self.packages.${pkgs.stdenv.hostPlatform.system} "refraction" {};
 
     user = mkOption {
       description = mdDoc ''
diff --git a/nix/packages.nix b/nix/packages.nix
deleted file mode 100644
index 4d1c9cd..0000000
--- a/nix/packages.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-{self, ...}: {
-  perSystem = {
-    pkgs,
-    self',
-    ...
-  }: {
-    packages = {
-      refraction = pkgs.callPackage ./derivation.nix {inherit self;};
-      default = self'.packages.refraction;
-    };
-  };
-
-  flake.overlays.default = _: prev: {
-    refraction = prev.callPackage ./derivation.nix {inherit self;};
-  };
-}