Remove "default.nix" trick

[curiousleo]

This is now handled correctly:

lorri/src/builder.rs

Lines 160 to 170 in 9418645

	// We need to emulate nix’s `default.nix` mechanism here.
	// That is, if the user uses something like
	// `import ./foo`
	// and `foo` is a directory, nix will actually import
	// `./foo/default.nix`
	// but still print `./foo`.
	// Since this is the only time directories are printed,
	// we can just manually re-implement that behavior.
	if src.is_dir() {
	src.push("default.nix");
	}