these 3 derivations will be built:
  /nix/store/ahg548lhcvzrlawm0gpqbisbdxh1g3lm-amrwb-11.0.0.0.tar.bz2.drv
  /nix/store/j5mlq6pb6rwm6y49la28d4v07jsix4k7-26204-b00.zip.drv
  /nix/store/s86k8rcskcsp0phiprhiw0nchg5ll9lx-amrwb-11.0.0.0.drv
error: Cannot build '/nix/store/817pisl45nbcbz2gbqd2albl4q1dlfw3-26204-b00.zip.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/3rqzbn4l1mnsbrf50rdxdkmzd79c7a5m-26204-b00.zip
       Last 8 log lines:
       >
       > trying http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-b00.zip
       >   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
       >                                  Dload  Upload   Total   Spent    Left  Speed
       > 100   192    0   192    0     0   1138      0 --:--:-- --:--:-- --:--:--  1142
       >   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
       > curl: (22) The requested URL returned error: 403
       > error: cannot download 26204-b00.zip from any mirror
       For full logs, run:
         nix log /nix/store/817pisl45nbcbz2gbqd2albl4q1dlfw3-26204-b00.zip.drv
error: build of resolved derivation '/nix/store/817pisl45nbcbz2gbqd2albl4q1dlfw3-26204-b00.zip.drv' failed
error: Cannot build '/nix/store/h89wci27maqg83qaxr86hbm89mw240gi-amrwb-11.0.0.0.tar.bz2.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/fnhdcjzibp4azyv1j88bhm9vnfp3y9sf-amrwb-11.0.0.0.tar.bz2
       Last 16 log lines:
       >
       > trying http://www.penguin.cz/~utx/ftp/amr/amrwb-11.0.0.0.tar.bz2
       >   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
       >                                  Dload  Upload   Total   Spent    Left  Speed
       >   0     0    0     0    0     0      0      0 --:--:--  0:02:16 --:--:--     0
       > curl: (28) Failed to connect to www.penguin.cz port 80 after 136335 ms: Couldn't connect to server
       > Warning: Problem : timeout. Will retry in 1 seconds. 3 retries left.
       >   0     0    0     0    0     0      0      0 --:--:--  0:02:14 --:--:--     0
       > curl: (28) Failed to connect to www.penguin.cz port 80 after 134102 ms: Couldn't connect to server
       > Warning: Problem : timeout. Will retry in 2 seconds. 2 retries left.
       >   0     0    0     0    0     0      0      0 --:--:--  0:02:13 --:--:--     0
       > curl: (28) Failed to connect to www.penguin.cz port 80 after 133167 ms: Couldn't connect to server
       > Warning: Problem : timeout. Will retry in 4 seconds. 1 retries left.
       >   0     0    0     0    0     0      0      0 --:--:--  0:02:15 --:--:--     0
       > curl: (28) Failed to connect to www.penguin.cz port 80 after 135254 ms: Couldn't connect to server
       > error: cannot download amrwb-11.0.0.0.tar.bz2 from any mirror
       For full logs, run:
         nix log /nix/store/h89wci27maqg83qaxr86hbm89mw240gi-amrwb-11.0.0.0.tar.bz2.drv
error: build of resolved derivation '/nix/store/h89wci27maqg83qaxr86hbm89mw240gi-amrwb-11.0.0.0.tar.bz2.drv' failed
error: Cannot build '/nix/store/s86k8rcskcsp0phiprhiw0nchg5ll9lx-amrwb-11.0.0.0.drv'.
       Reason: 2 dependencies failed.
       Output paths:
         /nix/store/8a82zkpyf1kq1ww82lbzn4yzihbnc7fy-amrwb-11.0.0.0