these 2 derivations will be built:
  /nix/store/pccdm5b3nh1xbnn2rfrdhfl6xiq95gry-source.drv
  /nix/store/mafybv5zgmrl29pjrsbcbfmvmxzv3a3m-mpv-youtube-quality-unstable-2020-02-11.drv
building '/nix/store/87dgznr9xkbgxsvvwlzihi0bdm8gk2gd-source.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=23&system=aarch64-linux'
building '/nix/store/87dgznr9xkbgxsvvwlzihi0bdm8gk2gd-source.drv' on farm.numtide.com:50051
source> elastic-arm-384804be: building 87dgznr9xkbgxsvvwlzihi0bdm8gk2gd-source.drv
source> 
source> trying https://github.com/jgreco/mpv-youtube-quality/archive/1f8c31457459ffc28cd1c3f3c2235a53efad7148.tar.gz
source>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
source>                                  Dload  Upload   Total   Spent    Left  Speed
source>   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
source> 100  914k    0  914k    0     0  1623k      0 --:--:-- --:--:-- --:--:-- 1623k
source> unpacking source archive /build/1f8c31457459ffc28cd1c3f3c2235a53efad7148.tar.gz
building '/nix/store/mafybv5zgmrl29pjrsbcbfmvmxzv3a3m-mpv-youtube-quality-unstable-2020-02-11.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=23&system=aarch64-linux'
building '/nix/store/mafybv5zgmrl29pjrsbcbfmvmxzv3a3m-mpv-youtube-quality-unstable-2020-02-11.drv' on farm.numtide.com:50051
mpv-youtube-quality-unstable-2020-02-11> elastic-arm-384804be: building mafybv5zgmrl29pjrsbcbfmvmxzv3a3m-mpv-youtube-quality-unstable-2020-02-11.drv
mpv-youtube-quality-unstable-2020-02-11> unpacking sources
mpv-youtube-quality-unstable-2020-02-11> unpacking source archive /nix/store/03vsrk2rakbwxkmmy017dayrp6w9ssaz-source
mpv-youtube-quality-unstable-2020-02-11> source root is source
mpv-youtube-quality-unstable-2020-02-11> patching sources
mpv-youtube-quality-unstable-2020-02-11> updateAutotoolsGnuConfigScriptsPhase
mpv-youtube-quality-unstable-2020-02-11> configuring
mpv-youtube-quality-unstable-2020-02-11> no configure script, doing nothing
mpv-youtube-quality-unstable-2020-02-11> installing
mpv-youtube-quality-unstable-2020-02-11> post-installation fixup
mpv-youtube-quality-unstable-2020-02-11> shrinking RPATHs of ELF executables and libraries in /nix/store/qq0ikjam974cgyqmzfa1q70lhcpwv48d-mpv-youtube-quality-unstable-2020-02-11
mpv-youtube-quality-unstable-2020-02-11> patching script interpreter paths in /nix/store/qq0ikjam974cgyqmzfa1q70lhcpwv48d-mpv-youtube-quality-unstable-2020-02-11
mpv-youtube-quality-unstable-2020-02-11> checking for references to /build/ in /nix/store/qq0ikjam974cgyqmzfa1q70lhcpwv48d-mpv-youtube-quality-unstable-2020-02-11...

upload niks3: ok