PackageCompiler.jl "Warning: it is not recommended to create an app/library without a preexisting manifest"

General Usage
3

Thanks! I already have a valid manifest.toml:

# This file is machine-generated - editing it directly is not advised

julia_version = "1.7.3"
manifest_format = "2.0"

[deps]

but PackageCompiler defines valid as nonempty, and so your solution (adding a package) removes the warning. I now believe that it is safe to ignore the warning in my case because my code depends on no packages, so it is okay to have an empty manifest.