these 3 derivations will be built:
  /nix/store/gn72av8b9x1lpcyrvh9jdml365lyi15k-amrnb-11.0.0.0.tar.bz2.drv
  /nix/store/krsbn4qhzpg24qin0yxx6khskbrhma3j-26104-b00.zip.drv
  /nix/store/igcjsjlh0nb7h8dd8kmh5vgknwaan4nq-amrnb-11.0.0.0.drv
building '/nix/store/hnm7bvh3kfgv66yh5xhzrrn9a06x4ac4-26104-b00.zip.drv'
26104-b00.zip> 
26104-b00.zip> trying https://www.3gpp.org/ftp/Specs/latest/Rel-11/26_series/26104-b00.zip
26104-b00.zip>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
26104-b00.zip>                                  Dload  Upload   Total   Spent    Left  Speed
26104-b00.zip>   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
26104-b00.zip> curl: (22) The requested URL returned error: 403
26104-b00.zip> error: cannot download 26104-b00.zip from any mirror
error: Cannot build '/nix/store/hnm7bvh3kfgv66yh5xhzrrn9a06x4ac4-26104-b00.zip.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/adck6r0lkj7v7wdagpdlikkbsqhnrv45-26104-b00.zip
       Last 7 log lines:
       >
       > trying https://www.3gpp.org/ftp/Specs/latest/Rel-11/26_series/26104-b00.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
       > curl: (22) The requested URL returned error: 403
       > error: cannot download 26104-b00.zip from any mirror
       For full logs, run:
         nix log /nix/store/hnm7bvh3kfgv66yh5xhzrrn9a06x4ac4-26104-b00.zip.drv
error: build of resolved derivation '/nix/store/hnm7bvh3kfgv66yh5xhzrrn9a06x4ac4-26104-b00.zip.drv' failed
building '/nix/store/zgxf9kp044nh9s5j5p8l7sjjz02la8pk-amrnb-11.0.0.0.tar.bz2.drv'
amrnb-11.0.0.0.tar.bz2> 
amrnb-11.0.0.0.tar.bz2> trying http://www.penguin.cz/~utx/ftp/amr/amrnb-11.0.0.0.tar.bz2
amrnb-11.0.0.0.tar.bz2>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
amrnb-11.0.0.0.tar.bz2>                                  Dload  Upload   Total   Spent    Left  Speed
amrnb-11.0.0.0.tar.bz2>   0     0    0     0    0     0      0      0 --:--:--  0:02:12 --:--:--     0
amrnb-11.0.0.0.tar.bz2> curl: (28) Failed to connect to www.penguin.cz port 80 after 132959 ms: Couldn't connect to server
amrnb-11.0.0.0.tar.bz2> Warning: Problem : timeout. Will retry in 1 seconds. 3 retries left.
amrnb-11.0.0.0.tar.bz2>   0     0    0     0    0     0      0      0 --:--:--  0:02:14 --:--:--     0
amrnb-11.0.0.0.tar.bz2> curl: (28) Failed to connect to www.penguin.cz port 80 after 134163 ms: Couldn't connect to server
amrnb-11.0.0.0.tar.bz2> Warning: Problem : timeout. Will retry in 2 seconds. 2 retries left.
amrnb-11.0.0.0.tar.bz2>   0     0    0     0    0     0      0      0 --:--:--  0:02:13 --:--:--     0
amrnb-11.0.0.0.tar.bz2> curl: (28) Failed to connect to www.penguin.cz port 80 after 133167 ms: Couldn't connect to server
amrnb-11.0.0.0.tar.bz2> Warning: Problem : timeout. Will retry in 4 seconds. 1 retries left.
amrnb-11.0.0.0.tar.bz2>   0     0    0     0    0     0      0      0 --:--:--  0:02:15 --:--:--     0
amrnb-11.0.0.0.tar.bz2> curl: (28) Failed to connect to www.penguin.cz port 80 after 135258 ms: Couldn't connect to server
amrnb-11.0.0.0.tar.bz2> error: cannot download amrnb-11.0.0.0.tar.bz2 from any mirror
error: Cannot build '/nix/store/zgxf9kp044nh9s5j5p8l7sjjz02la8pk-amrnb-11.0.0.0.tar.bz2.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ckij77v74gfs2f8s94m38c31h01psswx-amrnb-11.0.0.0.tar.bz2
       Last 16 log lines:
       >
       > trying http://www.penguin.cz/~utx/ftp/amr/amrnb-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 --:--:--  0:02:12 --:--:--     0
       > curl: (28) Failed to connect to www.penguin.cz port 80 after 132959 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 134163 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 135258 ms: Couldn't connect to server
       > error: cannot download amrnb-11.0.0.0.tar.bz2 from any mirror
       For full logs, run:
         nix log /nix/store/zgxf9kp044nh9s5j5p8l7sjjz02la8pk-amrnb-11.0.0.0.tar.bz2.drv
error: build of resolved derivation '/nix/store/zgxf9kp044nh9s5j5p8l7sjjz02la8pk-amrnb-11.0.0.0.tar.bz2.drv' failed
error: Cannot build '/nix/store/igcjsjlh0nb7h8dd8kmh5vgknwaan4nq-amrnb-11.0.0.0.drv'.
       Reason: 2 dependencies failed.
       Output paths:
         /nix/store/pckg6wda80j2fsyc5pf1k5yxfc23c7ia-amrnb-11.0.0.0