diff --git a/shell.nix b/shell.nix
index 023fc1bdb969c66f6b0d8da9d0c3b638396b96f1..5f5d6489ec325e0b763159835b671b8e4b612784 100644
--- a/shell.nix
+++ b/shell.nix
@@ -6,7 +6,7 @@ let
   inherit (tests) pkgs;
 in
 pkgs.mkShell {
-  buildInputs = [
+  packages = [
     tests.python
     tests.lint-python
     pkgs.niv