this derivation will be built:
  /nix/store/q7wj5sdgzr5ywcgcq8wnw23q1v805b11-pyrite-nix-concurrency.drv
building '/nix/store/q7wj5sdgzr5ywcgcq8wnw23q1v805b11-pyrite-nix-concurrency.drv'
pyrite-nix-concurrency> facter-threads=4
pyrite-nix-concurrency> facter-physical-cores=2
pyrite-nix-concurrency> max-jobs=2
pyrite-nix-concurrency> cores=2
pyrite-nix-concurrency> effective-cores=2
pyrite-nix-concurrency> demand=4
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy

upload niks3: ok