these 2 derivations will be built:
  /nix/store/ihq0y0izb9qr6bdjr6yxhdhy5nqa0iq5-nixos-test-driver-wrappers-regression-PSQL-1387.drv
  /nix/store/84y313b1lc7agmg30p9prkxjrxcwrj0d-vm-test-run-wrappers-regression-PSQL-1387.drv