these 5 derivations will be built:
  /nix/store/w75p2n3i283bxlqbsy186ma448n4hhbq-source.drv
  /nix/store/fbmnjn68snr563yvan1pc3z3d8jv2wpl-ctx-2.2.7-vendor-staging.drv
  /nix/store/fg8fr4q095zy98lr68l04p6bzb0m3712-ctx-2.2.7-vendor.drv
  /nix/store/s7grs8krh8jvsavsp64p058z07z4ba95-ctx-2.2.7.drv
  /nix/store/vxva13p5fsxq6kba4zhyalnlnz7q66l2-check-ctx.drv