these 6 derivations will be built:
  /nix/store/14nc1an9gpdbiqzb1s93x2s5ag9ffq5z-Cargo.toml.drv
  /nix/store/ghb542m17gph3ryl4lb3dvzb0dmf030v-Cargo.toml.drv
  /nix/store/mnx93bprni92qla6y14ir70qvkyvgc6z-Cargo.toml.drv
  /nix/store/y2wy6kz5l8957qb6gqjmpvinx378nl4z-source.drv
  /nix/store/rh03p7z5ciaqw99s03vv135y2n5ncfl6-flt-deps-0.1.0.drv
  /nix/store/sscc7hj420g16aznm3vw2xfyd9mkal76-flt-nextest-0.1.0.drv