diff --git a/.gitignore b/.gitignore
index 5e42d3f..7c5f3f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,2 @@
 /result
 /result-*
-flake.lock
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..e2852d0
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,333 @@
+{
+  "nodes": {
+    "bundlers": {
+      "inputs": {
+        "nix-appimage": "nix-appimage",
+        "nix-bundle": "nix-bundle",
+        "nix-utils": "nix-utils",
+        "nixpkgs": [
+          "cargoxx",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1777842037,
+        "narHash": "sha256-E6kwkFsKnU5k/QAX1aNOPfh69G6Im8/EwdRcZR4J0QE=",
+        "owner": "NixOS",
+        "repo": "bundlers",
+        "rev": "7bb70086c2dad3eecae4805f4d758c80e3cba960",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "bundlers",
+        "type": "github"
+      }
+    },
+    "cargoxx": {
+      "inputs": {
+        "bundlers": "bundlers",
+        "flake-utils": "flake-utils_3",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1779128270,
+        "narHash": "sha256-0ummfZJPptdxdvGvlob9viAdByvW+VFJOVDiNCvQYXE=",
+        "ref": "refs/heads/master",
+        "rev": "3138e78f47bbd865d55aaacda6d2a15c7b14e110",
+        "revCount": 64,
+        "type": "git",
+        "url": "https://git.amadey.xyz/mozart/cargoxx"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.amadey.xyz/mozart/cargoxx"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1733328505,
+        "narHash": "sha256-NeCCThCEP3eCl2l/+27kNNK7QrwZB1IJCrXfrbv5oqU=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "ff81ac966bb2cae68946d5ed5fc4994f96d0ffec",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "locked": {
+        "lastModified": 1623875721,
+        "narHash": "sha256-A8BU7bjS5GirpAUv4QA+QnJ4CceLHkcXdRp4xITDB0s=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "f7e004a55b120c02ecb6219596820fcd32ca8772",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_3": {
+      "inputs": {
+        "systems": "systems_3"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_4": {
+      "inputs": {
+        "systems": "systems_4"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nix-appimage": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
+        "nixpkgs": [
+          "cargoxx",
+          "bundlers",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1757920913,
+        "narHash": "sha256-jd0QwCVz4O1sHHkeaZILD/7D6oyalceEJ4EFnWCgm0k=",
+        "owner": "ralismark",
+        "repo": "nix-appimage",
+        "rev": "7946addbc0d97e358a6d7aefe5e82310f0fe6b18",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ralismark",
+        "repo": "nix-appimage",
+        "type": "github"
+      }
+    },
+    "nix-bundle": {
+      "inputs": {
+        "nixpkgs": [
+          "cargoxx",
+          "bundlers",
+          "nixpkgs"
+        ],
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1756736056,
+        "narHash": "sha256-8YFhvulVX3iS4TYnKisA9zSImJeFN21G75HOUUFjzuE=",
+        "owner": "nix-community",
+        "repo": "nix-bundle",
+        "rev": "eff01593f62794d458ec714090091419194ab64d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-bundle",
+        "type": "github"
+      }
+    },
+    "nix-utils": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1744222205,
+        "narHash": "sha256-di1eNHQdpvvyXv6i7Z+S79KF7cQyhTs7AdFHp7q1e3Q=",
+        "owner": "juliosueiras-nix",
+        "repo": "nix-utils",
+        "rev": "53282197ad090c8cf47c96e99bf6c6c3b2cdc7c0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "juliosueiras-nix",
+        "repo": "nix-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1629252929,
+        "narHash": "sha256-Aj20gmGBs8TG7pyaQqgbsqAQ6cB+TVuL18Pk3DPBxcQ=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "3788c68def67ca7949e0864c27638d484389363d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1777954456,
+        "narHash": "sha256-hGdgeU2Nk87RAuZyYjyDjFL6LK7dAZN5RE9+hrDTkDU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "549bd84d6279f9852cae6225e372cc67fb91a4c1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1778869304,
+        "narHash": "sha256-30sZNZoA1cqF5JNO9fVX+wgiQYjB7HJqqJ4ztCDeBZE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "d233902339c02a9c334e7e593de68855ad26c4cb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "cargoxx": "cargoxx",
+        "flake-utils": "flake-utils_4",
+        "nixpkgs": "nixpkgs_3"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_3": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_4": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
index c9bbc5e..9b0b473 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,13 +5,10 @@
     nixpkgs.url     = "github:NixOS/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
 
-    # During local development we point at the sibling cargoxx checkout
-    # via an absolute `git+file://` URL. Once the registry lives on Gitea
-    # this becomes a Gitea URL pinned to a specific cargoxx revision —
-    # that pin, alongside `lock.cargoxx_rev` in each recipe, is what
-    # makes registry derivations deterministic across consumers (see
-    # docs/library-reuse-and-publish.md in the cargoxx repo).
-    cargoxx.url = "git+file:///home/mozart/cargoxx";
+    # Gitea-hosted cargoxx. flake.lock pins the exact rev — bump it
+    # explicitly via `nix flake update cargoxx` when the registry should
+    # adopt a newer cargoxx codegen.
+    cargoxx.url = "git+https://git.amadey.xyz/mozart/cargoxx";
   };
 
   outputs = { self, nixpkgs, flake-utils, cargoxx }:
diff --git a/runner/.gitignore b/runner/.gitignore
index 542bdc9..15847fe 100644
--- a/runner/.gitignore
+++ b/runner/.gitignore
@@ -1,4 +1,3 @@
 .env
 data/
-flake.lock
 result
diff --git a/runner/flake.lock b/runner/flake.lock
new file mode 100644
index 0000000..62ec88a
--- /dev/null
+++ b/runner/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1778869304,
+        "narHash": "sha256-30sZNZoA1cqF5JNO9fVX+wgiQYjB7HJqqJ4ztCDeBZE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "d233902339c02a9c334e7e593de68855ad26c4cb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}