this derivation will be built:
  /nix/store/id9mh267ikgnbs8xk5qh1r22gy191y0c-unidings-13.00.drv
building '/nix/store/p8skjxy263dp902mwyhll7k8fwp67ch7-unidings-13.00.drv'
unidings-13.00> 
unidings-13.00> trying https://dn-works.com/wp-content/uploads/2020/UFAS-Fonts/Unidings.zip
unidings-13.00>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
unidings-13.00>                                  Dload  Upload   Total   Spent    Left  Speed
unidings-13.00>   0     0    0     0    0     0      0      0 --:--:--  0:00:03 --:--:--     0
unidings-13.00> curl: (22) The requested URL returned error: 404
unidings-13.00> error: cannot download unidings-13.00 from any mirror
error: Cannot build '/nix/store/p8skjxy263dp902mwyhll7k8fwp67ch7-unidings-13.00.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/4mb1lfncw25rqq86l571a9b2api9sfaz-unidings-13.00
       Last 7 log lines:
       >
       > trying https://dn-works.com/wp-content/uploads/2020/UFAS-Fonts/Unidings.zip
       >   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
       >                                  Dload  Upload   Total   Spent    Left  Speed
       >   0     0    0     0    0     0      0      0 --:--:--  0:00:03 --:--:--     0
       > curl: (22) The requested URL returned error: 404
       > error: cannot download unidings-13.00 from any mirror
       For full logs, run:
         nix log /nix/store/p8skjxy263dp902mwyhll7k8fwp67ch7-unidings-13.00.drv
error: build of resolved derivation '/nix/store/p8skjxy263dp902mwyhll7k8fwp67ch7-unidings-13.00.drv' failed