diff --git a/fava.nix b/fava.nix
index 74aca88..489afd6 100644
--- a/fava.nix
+++ b/fava.nix
@@ -5,19 +5,14 @@ with lib;
 let
   cfg = config.services.fava;
 
-  # Build fava with extensions included in its Python environment.
-  # Extensions that depend on fava are overridden to remove it from their
-  # dependencies, avoiding duplicate package conflicts in the closure.
-  stripFavaDep = ext: ext.overridePythonAttrs (old: {
-    dependencies = builtins.filter (dep: (dep.pname or "") != "fava") (old.dependencies or []);
-    dontCheckRuntimeDeps = true;
-  });
-
+  # Build a Python environment with fava and all extensions.
+  # This avoids duplicate package conflicts by letting Python resolve
+  # shared dependencies (like fava itself) in a single environment.
+  python = cfg.package.pythonModule;
   favaWithExtensions = if cfg.extensions == [] then cfg.package else
-    cfg.package.overridePythonAttrs (old: {
-      dependencies = (old.dependencies or []) ++ map stripFavaDep cfg.extensions;
-      dontCheckForDuplicates = true;
-    });
+    let
+      env = python.withPackages (ps: [ cfg.package ] ++ cfg.extensions);
+    in env;
 
 in {
   options.services.fava = {