structuredAttrs is enabled

trying https://github.com/ntpeters/vim-better-whitespace/archive/de99b55a6fe8c96a69f9376f16b1d5d627a56e81.tar.gz
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
  0      0   0      0   0      0      0      0                              0
100  12467   0  12467   0      0  27930      0                              0
unpacking source archive /nix/var/nix/builds/nix-57169-328536134/download.tar.gz