these 2 derivations will be built:
  /nix/store/3hd8ip51mancwv5rcc9y1hjk4h94p9dy-source.drv
  /nix/store/dl3b88kscc92vvvm6j46bks689bnakyz-cups-kyocera-ecosys-m2x35-40-p2x35-40dnw-8.1606.drv
building '/nix/store/9cp3nbqi7jypqi9aphgx2ksk26384s3n-source.drv'
source> 
source> trying https://www.kyoceradocumentsolutions.de/content/download-center/de/drivers/all/Linux_8_1606_ECOSYS_M2x35_40_P2x35_40dnw_zip.download.zip
source>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
source>                                  Dload  Upload   Total   Spent    Left  Speed
source>   0  138k    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
source> curl: (22) The requested URL returned error: 404
source> error: cannot download source from any mirror
error: Cannot build '/nix/store/9cp3nbqi7jypqi9aphgx2ksk26384s3n-source.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/a8svkjj1im6iphlckqv2zhwwwidw3snr-source
       Last 7 log lines:
       >
       > trying https://www.kyoceradocumentsolutions.de/content/download-center/de/drivers/all/Linux_8_1606_ECOSYS_M2x35_40_P2x35_40dnw_zip.download.zip
       >   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
       >                                  Dload  Upload   Total   Spent    Left  Speed
       >   0  138k    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
       > curl: (22) The requested URL returned error: 404
       > error: cannot download source from any mirror
       For full logs, run:
         nix log /nix/store/9cp3nbqi7jypqi9aphgx2ksk26384s3n-source.drv
error: build of resolved derivation '/nix/store/9cp3nbqi7jypqi9aphgx2ksk26384s3n-source.drv' failed
error: Cannot build '/nix/store/dl3b88kscc92vvvm6j46bks689bnakyz-cups-kyocera-ecosys-m2x35-40-p2x35-40dnw-8.1606.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/k3g6j8lq1fd59wlp38sqbl17h3smfkdg-cups-kyocera-ecosys-m2x35-40-p2x35-40dnw-8.1606