this derivation will be built:
  /nix/store/bjw36zsmkims61diq88pnibmqaqw6vqy-pg_regress-15.19.drv
building '/nix/store/bjw36zsmkims61diq88pnibmqaqw6vqy-pg_regress-15.19.drv'
pg_regress-15.19> Running phase: installPhase