diff --git a/flake.lock b/flake.lock
index b952c9a..e677bac 100644
--- a/flake.lock
+++ b/flake.lock
@@ -21,9 +21,29 @@
         "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"
+      }
+    },
     "naersk": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": [
+          "nixpkgs"
+        ]
       },
       "locked": {
         "lastModified": 1662220400,
@@ -39,38 +59,72 @@
         "type": "github"
       }
     },
-    "nixpkgs": {
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "poetry2nix",
+          "nixpkgs"
+        ]
+      },
       "locked": {
-        "lastModified": 0,
-        "narHash": "sha256-50235YW76Jnx4okogoJv/sMz+WNnqC+0DqtkV3jm2XM=",
-        "path": "/nix/store/aw7bxjysi3wd3xia5qh7qqwsbqmyqbya-source",
-        "type": "path"
+        "lastModified": 1703863825,
+        "narHash": "sha256-rXwqjtwiGKJheXB43ybM8NwWB8rO2dSRrEqes0S7F5Y=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "5163432afc817cf8bd1f031418d1869e4c9d5547",
+        "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
-        "type": "indirect"
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
       }
     },
-    "nixpkgs_2": {
+    "nixpkgs": {
       "locked": {
-        "lastModified": 1682173319,
-        "narHash": "sha256-tPhOpJJ+wrWIusvGgIB2+x6ILfDkEgQMX0BTtM5vd/4=",
+        "lastModified": 1714971268,
+        "narHash": "sha256-IKwMSwHj9+ec660l+I4tki/1NRoeGpyA2GdtdYpAgEw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ee7ec1c71adc47d2e3c2d5eb0d6b8fbbd42a8d1c",
+        "rev": "27c13997bf450a01219899f5a83bd6ffbfc70d3c",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-22.11",
+        "ref": "nixos-23.11",
         "type": "indirect"
       }
     },
+    "poetry2nix": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nix-github-actions": "nix-github-actions",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "systems": "systems_2",
+        "treefmt-nix": "treefmt-nix"
+      },
+      "locked": {
+        "lastModified": 1715017507,
+        "narHash": "sha256-RN2Vsba56PfX02DunWcZYkMLsipp928h+LVAWMYmbZg=",
+        "owner": "nix-community",
+        "repo": "poetry2nix",
+        "rev": "e6b36523407ae6a7a4dfe29770c30b3a3563b43a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "poetry2nix",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "fenix": "fenix",
         "naersk": "naersk",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs",
+        "poetry2nix": "poetry2nix",
         "utils": "utils"
       }
     },
@@ -91,6 +145,56 @@
         "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"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "id": "systems",
+        "type": "indirect"
+      }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "poetry2nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1714058656,
+        "narHash": "sha256-Qv4RBm4LKuO4fNOfx9wl40W2rBbv5u5m+whxRYUMiaA=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "c6aaf729f34a36c445618580a9f95a48f5e4e03f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    },
     "utils": {
       "locked": {
         "lastModified": 1659877975,
diff --git a/flake.nix b/flake.nix
index a043012..efc106e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,18 +3,28 @@
 
   inputs = {
     utils.url = "github:numtide/flake-utils";
-    naersk.url = "github:nix-community/naersk";
+    naersk = {
+      url = "github:nix-community/naersk";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     # Current Rust in nixpkgs is too old unfortunately — let's use the Fenix overlay's packages...
     fenix = {
       url = "github:nix-community/fenix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    nixpkgs.url = "nixpkgs/nixos-22.11";
+    nixpkgs.url = "nixpkgs/nixos-23.11";
+    poetry2nix = {
+      url = "github:nix-community/poetry2nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
-  outputs = { self, nixpkgs, utils, naersk, fenix }:
+  outputs = { self, nixpkgs, utils, naersk, fenix, poetry2nix }:
     utils.lib.eachDefaultSystem (system: let
       pkgs = nixpkgs.legacyPackages."${system}";
+
+      inherit (poetry2nix.lib.mkPoetry2Nix { inherit pkgs; }) mkPoetryApplication;
+
       #fenixRustToolchain = fenix.packages."${system}".minimal.toolchain
 #       fenixRustToolchain =
 #         fenix."${system}".complete.withComponents [
@@ -65,16 +75,16 @@
 
         buildInputs = with pkgs; [
           openssl
-          pkgconfig
+          pkg-config
           sqlite
         ];
       };
 
-      mysqlHelper = pkgs.poetry2nix.mkPoetryApplication {
+      mysqlHelper = mkPoetryApplication {
         projectDir = ./datman-helper-mysql;
       };
 
-      postgresHelper = pkgs.poetry2nix.mkPoetryApplication {
+      postgresHelper = mkPoetryApplication {
         projectDir = ./datman-helper-postgres;
       };