diff --git a/.gitignore b/.gitignore
index c385ae3..c12bd80 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@
 __pycache__
 config.py
 *.socket
+result
+result-*
diff --git a/flake.lock b/flake.lock
index 57c9216..bfc4792 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,89 +1,24 @@
 {
   "nodes": {
-    "flake-utils": {
-      "locked": {
-        "lastModified": 1659877975,
-        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "flake-utils_2": {
-      "locked": {
-        "lastModified": 1659877975,
-        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1661621241,
-        "narHash": "sha256-qUsCgbZNM9b8yOV2XWB//0/qUduDAnbB9WFXr8XzWB0=",
+        "lastModified": 1692174805,
+        "narHash": "sha256-xmNPFDi/AUMIxwgOH/IVom55Dks34u1g7sFKKebxUm0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f214afa5fb6452900e27776735db21f5092261b8",
+        "rev": "caac0eb6bdcad0b32cb2522e03e4002c8975c62e",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1661621241,
-        "narHash": "sha256-qUsCgbZNM9b8yOV2XWB//0/qUduDAnbB9WFXr8XzWB0=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "f214afa5fb6452900e27776735db21f5092261b8",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "poetry2nix": {
-      "inputs": {
-        "flake-utils": "flake-utils_2",
-        "nixpkgs": "nixpkgs_2"
-      },
-      "locked": {
-        "lastModified": 1661298951,
-        "narHash": "sha256-R4zRiXIYic14aNJGuWvBZBblyt6I0GNzgBEQAXhchf4=",
-        "owner": "nix-community",
-        "repo": "poetry2nix",
-        "rev": "e1e95bbf61be2d150613f5e0560d70c4b316ba4a",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "poetry2nix",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs",
-        "poetry2nix": "poetry2nix"
+        "nixpkgs": "nixpkgs"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 18b1938..b3174f2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,55 +1,70 @@
 {
   description = "A REST API for managing a MPV instance over via a RPC socket";
 
-  inputs.flake-utils.url = "github:numtide/flake-utils";
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs";
-  inputs.poetry2nix.url = "github:nix-community/poetry2nix";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
-  outputs = { self, nixpkgs, flake-utils, poetry2nix }:
-    {
-      # Nixpkgs overlay providing the application
-      overlay = nixpkgs.lib.composeManyExtensions [
-        poetry2nix.overlay
-        (final: prev: {
-          # The application
-          grzegorz = prev.poetry2nix.mkPoetryApplication {
-            projectDir = ./.;
-          };
-        })
-      ];
-    } // (flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = import nixpkgs {
-          inherit system;
-          overlays = [ self.overlay ];
-        };
-        entrypoint = pkgs.writeShellApplication {
-          name = "grzegorz-run";
-          runtimeInputs = [
-            pkgs.grzegorz
-            pkgs.mpv
-          ];
-          text = ''
-            SPIS_MEG=()
-            if test -z "$*"; then
-              >&2 echo "DEBUG: No args provided, running with defaults...."
-              SPIS_MEG=("--host" "::" "--port" "8080")
-            fi
-            (
-                set -x
-                sanic grzegorz.app "''${SPIS_MEG[@]}" "$@"
-            )
-          '';
-        };
-      in {
-        packages = {
-          inherit (pkgs) grzegorz;
-          grzegorz-run = entrypoint;
-        };
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  } @ inputs:
+  let
+    forSystems = systems: f: nixpkgs.lib.genAttrs systems (system: f rec {
+      inherit system;
+      pkgs = nixpkgs.legacyPackages.${system};
+      lib  = nixpkgs.legacyPackages.${system}.lib;
+    });
+    forAllSystems = forSystems [
+      "x86_64-linux"
+      "aarch64-linux"
+      #"riscv64-linux"
+    ];
+  in {
 
-        apps = {
-          default.type = "app";
-          default.program = "${entrypoint}/bin/grzegorz-run";
+    packages = forAllSystems ({ system, pkgs, ...}: rec {
+      sanic-openapi = with pkgs.python3.pkgs; buildPythonPackage rec {
+        pname = "sanic-openapi";
+        version = "21.12.0";
+        src = fetchPypi {
+          inherit pname version;
+          hash = "sha256-fNpiI00IyWX3OeqsawWejyRNhwYdlzNcVyh/1q4Wv1I=";
         };
-      }));
+        propagatedBuildInputs = [ sanic pyyaml ];
+        doCheck = false;
+      };
+      grzegorz = with pkgs.python3.pkgs; buildPythonPackage {
+        pname = "grzegorz";
+        version = (builtins.fromTOML (builtins.readFile ./pyproject.toml)).tool.poetry.version;
+        format = "pyproject";
+        src = ./.;
+        postInstall = ''
+        '';
+        nativeBuildInputs = [ poetry-core ];
+        propagatedBuildInputs = [ sanic sanic-openapi youtube-dl mpv ];
+        doCheck = false;
+      };
+      grzegorz-run = pkgs.writeShellApplication {
+        name = "grzegorz-run";
+        runtimeInputs = [ grzegorz pkgs.mpv ];
+        text = ''
+          TOOMANYARGS=()
+          if test -z "$*"; then
+            >&2 echo "DEBUG: No args provided, running with defaults...."
+            TOOMANYARGS=("--host" "::" "--port" "8080")
+          fi
+          (
+              set -x
+              sanic grzegorz.app "''${TOOMANYARGS[@]}" "$@"
+          )
+        '';
+      };
+
+    });
+
+    apps = forAllSystems ({ system, pkgs, ...}: {
+      default.type = "app";
+      default.program = "${self.packages.${system}.grzegorz-run}/bin/grzegorz-run";
+    });
+
+  };
 }
diff --git a/pyproject.toml b/pyproject.toml
index 30b4974..721fa71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,10 +7,10 @@ license = "MIT"
 
 [tool.poetry.dependencies]
 python = ">=3.7,<4.0"
-mpv = "^0.1" # TODO: do we use this?
+mpv = ">=0.1" # TODO: do we use this?
 youtube_dl = "^2021.12.17"
-sanic = "^21.12.2"
-sanic-openapi = "^21.6.1"
+sanic = ">=21.12.2"
+sanic-openapi = ">=21.6.1"
 
 [tool.poetry.dev-dependencies]
 python-lsp-server = {extras = ["all"], version = "^1.3.3"}