these 2 derivations will be built:
  /nix/store/k7vzp9jx7hlvj1mxsr22ym84ich54wzw-home-manager-files.drv
  /nix/store/7zpi756v39v24dwb2nwd0kyjkgdvl0zx-home-manager-generation.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy