these 5 derivations will be built:
  /nix/store/442zb5lj743rk15mcvq1blqld12i94jb-source.drv
  /nix/store/rjsav98j3pqiwzigla83jnamrns193v7-workmux-0.1.267-vendor-staging.drv
  /nix/store/n3si3vppb31cfznmcwycbvf5h3qma979-workmux-0.1.267-vendor.drv
  /nix/store/g0dfcvywcizd1dxzzhck1zki764vh0w9-workmux-0.1.267.drv
  /nix/store/wi75fm08asd3gl5s73w0fn32g87cz5fa-check-workmux.drv