these 2 derivations will be built:
  /nix/store/5mgxkypagdmxkbs3632mr8gdp327kpc5-flake-inputs.drv
  /nix/store/l5k3fkd7ds8jnx6iqkkpfxpw49l3f6vy-check-flake-inputs.drv
building '/nix/store/5mgxkypagdmxkbs3632mr8gdp327kpc5-flake-inputs.drv'
building '/nix/store/l5k3fkd7ds8jnx6iqkkpfxpw49l3f6vy-check-flake-inputs.drv'

upload niks3: ok