this derivation will be built:
  /nix/store/m4i6csxqn88skgdk9cq1siv5avvnmmzz-kochi-substitute-naga10-20030809.drv
building '/nix/store/3vzy69d89cvsqyy0jsj3s6ac4piq1lgr-kochi-substitute-naga10-20030809.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=21&system=aarch64-linux'
building '/nix/store/3vzy69d89cvsqyy0jsj3s6ac4piq1lgr-kochi-substitute-naga10-20030809.drv' on farm.numtide.com:50051
kochi-substitute-naga10-20030809> elastic-arm-0f89b4f7: building 3vzy69d89cvsqyy0jsj3s6ac4piq1lgr-kochi-substitute-naga10-20030809.drv
kochi-substitute-naga10-20030809> 
kochi-substitute-naga10-20030809> trying https://osdn.dl.osdn.jp/efont/5411/kochi-substitute-20030809.tar.bz2
kochi-substitute-naga10-20030809>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
kochi-substitute-naga10-20030809>                                  Dload  Upload   Total   Spent    Left  Speed
kochi-substitute-naga10-20030809>   0   678    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
kochi-substitute-naga10-20030809> curl: (22) The requested URL returned error: 404
kochi-substitute-naga10-20030809> 
kochi-substitute-naga10-20030809> trying https://osdn.mirror.constant.com/efont/5411/kochi-substitute-20030809.tar.bz2
kochi-substitute-naga10-20030809>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
kochi-substitute-naga10-20030809>                                  Dload  Upload   Total   Spent    Left  Speed
kochi-substitute-naga10-20030809>   0   146    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
kochi-substitute-naga10-20030809> curl: (22) The requested URL returned error: 404
kochi-substitute-naga10-20030809> 
kochi-substitute-naga10-20030809> trying https://mirrors.gigenet.com/OSDN/efont/5411/kochi-substitute-20030809.tar.bz2
kochi-substitute-naga10-20030809>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
kochi-substitute-naga10-20030809>                                  Dload  Upload   Total   Spent    Left  Speed
kochi-substitute-naga10-20030809> 100 8472k  100 8472k    0     0  5971k      0  0:00:01  0:00:01 --:--:-- 5974k
kochi-substitute-naga10-20030809> unpacking source archive /build/kochi-substitute-20030809.tar.bz2

upload niks3: ok