these 3 derivations will be built:
  /nix/store/31w69wk7vymdyfqi805pcmqwqwcksxqr-pythoncheck.sh.drv
  /nix/store/vhsgxwd3z0h7iblsfx2kfknnag5jgjr1-pythoncheck.sh.drv
  /nix/store/g9mg4sqazjsll84kr1zxvy0jng7sdg24-ha-walker.drv
building '/nix/store/31w69wk7vymdyfqi805pcmqwqwcksxqr-pythoncheck.sh.drv'
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
building '/nix/store/vhsgxwd3z0h7iblsfx2kfknnag5jgjr1-pythoncheck.sh.drv'
building '/nix/store/g9mg4sqazjsll84kr1zxvy0jng7sdg24-ha-walker.drv'

upload niks3: ok