this derivation will be built:
  /nix/store/bfgjwxd716mjwcas01855gg84p6qq6gd-site-env-17.drv
building '/nix/store/bfgjwxd716mjwcas01855gg84p6qq6gd-site-env-17.drv'
site-env-17> created 2 symlinks in user environment