this derivation will be built:
  /nix/store/lqs6bgpg0c282gx6lxw5104hi47xbzlr-pg_isolation_regress-15.19.drv
building '/nix/store/lqs6bgpg0c282gx6lxw5104hi47xbzlr-pg_isolation_regress-15.19.drv'
pg_isolation_regress-15.19> Running phase: installPhase