these 5 derivations will be built:
  /nix/store/jznnkkppailb3fmjw7k4c4yybz4lm51z-source.drv
  /nix/store/g7zn0l5a8sjlqia6rwpb0xapnif1fg90-ctx-2.1.3-vendor-staging.drv
  /nix/store/6hjz93i9wc3z0rmbh3l9qx46kddq580b-ctx-2.1.3-vendor.drv
  /nix/store/ql5n9cq1jg3ykq9rilykyp7krdgmp09n-ctx-2.1.3.drv
  /nix/store/m2micfwy3wxzgv60rs325nf9j179kabs-check-ctx.drv