This prevents flake_env from deleting the directory containing the
.envrc file if the flake specifier is ".". In 7759d2a, the order of the
arguments was swapped:
In bin/flake_env.re
- let flake_specifier = argv[1];
- let layout_directory = argv[2];
In lib/flake_env__util.re
+ let layout_directory = argv[1];
+ let flake_specifier = argv[2];
but the direnvrc was not updated to match.
Fixes: 7759d2ac6a