Fix/lint

tools/nix/ansible.nix

 { pkgs }:
-with pkgs.buildPackages; [
-  ansible
-  ansible-lint
+[
+  pkgs.ansible
+  pkgs.ansible-lint
   (pkgs.python3.withPackages (python-pkgs: [
     python-pkgs.openstacksdk
     python-pkgs.passlib
@@ -11,4 +11,4 @@ with pkgs.buildPackages; [
     python-pkgs.pyhcl
     python-pkgs.pytest
   ]))
-];
+]