flake.nix: source package name and version from pyproject.toml

default.nix

@@ -6,10 +6,15 @@
 
 , sqlalchemy
 }:
-
+let
+  pyproject = lib.pipe ./pyproject.toml [
+    builtins.readFile
+    builtins.fromTOML
+  ];
+in
 buildPythonPackage {
-  pname = "libdib";
-  version = "unstable";
+  pname = pyproject.project.name;
+  version = pyproject.project.version;
   src = lib.cleanSource ./.;
 
   format = "pyproject";