warning: ignoring untrusted flake configuration setting 'extra-substituters'.
Pass '--accept-flake-config' to trust it
warning: ignoring untrusted flake configuration setting 'extra-trusted-public-keys'.
Pass '--accept-flake-config' to trust it
trace: evaluation warning: buildDepsOnly will ignore `src` when `dummySrc` is specified
warning: error: SQLite database '/nix/var/nix/db/db.sqlite' is busy
this path will be fetched (0.00 MiB download, 0.23 MiB unpacked):
  /nix/store/j65va0rrbgqp96v9ih0iz40d409imgxy-ucs00-pingpong-1.0.0
this path will be fetched (0.00 MiB download, 0.23 MiB unpacked):
  /nix/store/j65va0rrbgqp96v9ih0iz40d409imgxy-ucs00-pingpong-1.0.0