this derivation will be built:
  /nix/store/lkhfxx8jsv0n7q0a385dh5r0d386k37f-postgresql-15.19-src-15.19.drv
this path will be fetched (2.2 KiB download, 8.0 KiB unpacked):
  /nix/store/qx72zagvcp8bpswy9vfkchkisi37sm61-bzip2-1.0.8-dev