these 5 derivations will be built:
  /nix/store/mdlkyccgxji3cmbcrpnvsfri95yw9702-source.drv
  /nix/store/4r4yrsinap0rjidzxjndlf0xv2p0cqgx-ctx-2.0.0-vendor-staging.drv
  /nix/store/bgdbgmi0a8zqbflrp299mxaf55qrwqz5-ctx-2.0.0-vendor.drv
  /nix/store/dchny54fzya5pyqiii1iwrgdy3aggw1f-ctx-2.0.0.drv
  /nix/store/gyf04n3w324nk7jca7bmbfb5wlzcqd0m-check-ctx.drv