diff --git a/flake.lock b/flake.lock
index 9917bc9..978ca5f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,12 +1,15 @@
 {
   "nodes": {
     "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
       "locked": {
-        "lastModified": 1622445595,
-        "narHash": "sha256-m+JRe6Wc5OZ/mKw2bB3+Tl0ZbtyxxxfnAWln8Q5qs+Y=",
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "7d706970d94bc5559077eb1a6600afddcd25a7c8",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
         "type": "github"
       },
       "original": {
@@ -15,23 +18,123 @@
         "type": "github"
       }
     },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "poetry2nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1703863825,
+        "narHash": "sha256-rXwqjtwiGKJheXB43ybM8NwWB8rO2dSRrEqes0S7F5Y=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "5163432afc817cf8bd1f031418d1869e4c9d5547",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1622282707,
-        "narHash": "sha256-+GOrUDsdneUqrOm9d+9bHXjEVoVcU8tm14WGVzbt6gg=",
-        "path": "/nix/store/9za793c35j4rnawwf2n2wpbwwnah1rq9-source",
-        "rev": "6933d068c5d2fcff398e802f7c4e271bbdab6705",
-        "type": "path"
+        "lastModified": 1716361217,
+        "narHash": "sha256-mzZDr00WUiUXVm1ujBVv6A0qRd8okaITyUp4ezYRgc4=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "46397778ef1f73414b03ed553a3368f0e7e33c2f",
+        "type": "github"
       },
       "original": {
         "id": "nixpkgs",
         "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": 1715251496,
+        "narHash": "sha256-vRBfJCKvJtu5sYev56XStirA3lAOPv0EkoEV2Nfc+tc=",
+        "owner": "nix-community",
+        "repo": "poetry2nix",
+        "rev": "291a863e866972f356967d0a270b259f46bf987f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "2024.5.939250",
+        "repo": "poetry2nix",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "poetry2nix": "poetry2nix"
+      }
+    },
+    "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": 1715940852,
+        "narHash": "sha256-wJqHMg/K6X3JGAE9YLM0LsuKrKb4XiBeVaoeMNlReZg=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "2fba33a182602b9d49f0b2440513e5ee091d838b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 00d649b..45eb867 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,12 +1,22 @@
 {
   inputs = {
     flake-utils.url = "github:numtide/flake-utils";
+    poetry2nix = {
+      url = "github:nix-community/poetry2nix/2024.5.939250";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.flake-utils.follows = "flake-utils";
+    };
   };
 
-  outputs = { self, flake-utils, nixpkgs }: (flake-utils.lib.eachDefaultSystem (
+  outputs = { self, flake-utils, nixpkgs, ... }@inputs: (flake-utils.lib.eachDefaultSystem (
     system:
     let
-      pkgs = nixpkgs.legacyPackages.${system};
+      pkgs = import nixpkgs {
+        inherit system;
+        config.packageOverrides = _: {
+          poetry2nix = inputs.poetry2nix.lib.mkPoetry2Nix { inherit pkgs; };
+        };
+      };
       openconnect-sso = (import ./nix { inherit pkgs; }).openconnect-sso;
     in
     {
diff --git a/pyproject.toml b/pyproject.toml
index f349a97..8607513 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,5 +49,5 @@ pytest-httpserver = "^1.0"
 target-version = ['py36', 'py37', 'py38']
 
 [build-system]
-requires = ["poetry>=0.12"]
-build-backend = "poetry.masonry.api"
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"