these 2 derivations will be built:
  /nix/store/grqwn84cvxz4p6h3brnfqd4w2l98wzpn-nixos-test-driver-pg_partman.drv
  /nix/store/ppni41xmi8v0s2in10p6596kd3rd322j-vm-test-run-pg_partman.drv