use pyproject.toml

flake.nix

@@ -1,59 +1,60 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    pyproject-nix = {
+      url = "github:nix-community/pyproject.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
   outputs = {
     self,
     nixpkgs,
+    ...
   } @ inputs: let
     system = "x86_64-linux";
     pkgs = import nixpkgs {
       inherit system;
       config.allowUnfree = true;
     };
-  in {
-    devShells.${system}.default = pkgs.mkShell {
-      packages = with pkgs; [
-        python313
-        python313Packages.flask
-        python313Packages.waitress
-      ];
-
-      shellHook = ''
-        python --version
-        exec zsh
-      '';
+    python = pkgs.python3;
+    serverProject = inputs.pyproject-nix.lib.project.loadPyproject {
+      projectRoot = ./.;
     };
+  in {
+    # devShells.${system}.default = pkgs.mkShell {
+    #   packages = with pkgs; [
+    #     python313
+    #     python313Packages.flask
+    #     python313Packages.waitress
+    #   ];
+    #
+    #   shellHook = ''
+    #     python --version
+    #     exec zsh
+    #   '';
+    # };
     packages.${system} = let
       scanbuddy = pkgs.writeShellApplication {
-        name = "scanbuddy-script";
+        name = "scanbuddy";
 
         runtimeInputs = with pkgs; [sane-backends brscan5 ghostscript];
 
         text = builtins.readFile ./scanbuddy.bash;
       };
-      wrapper = pkgs.writeShellApplication {
-        name = "scanbuddy-wrapper";
 
-        text =
-          /*
-          bash
-          */
-          ''
-            #!/usr/bin/env bash
-            readarray -d '_' args < <(printf "%s" "$1")
-
-            scanbuddy "''${args[@]}"
-          '';
-      };
-      package = pkgs.symlinkJoin {
-        name = "scanbuddy";
-        paths = [scanbuddy wrapper];
-      };
+      # Returns an attribute set that can be passed to `buildPythonPackage`.
+      attrs = serverProject.renderers.buildPythonPackage {inherit python;};
+      server = python.pkgs.buildPythonPackage (attrs
+        // {
+          env.CUSTOM_ENVVAR = "foobar";
+        });
     in {
-      default = package;
+      default = pkgs.symlinkJoin {
+        name = "scanbuddy";
+        paths = [scanbuddy server];
+      };
       inherit scanbuddy;
-      inherit wrapper;
+      inherit server;
     };
   };
 }