invalid enumeration value: 'openbsd'

[reznikmm]

Describe the bug
Not an issue for me, but perhaps you may want it to be reported. If I build HEAD ( commit be902e8) with "Build alr with alr" I get error:

$ alr build
error: Cannot continue without a workspace:
error:    Loading release from manifest: alire.toml:
error:    Failed to load alire.toml:
error:    Loading release from manifest: alire.toml:
error:    gpr-set-externals:
error:    values:
error:    case(os):
error:    invalid enumeration value: 'openbsd'. Can be: freebsd, linux, macos, os-unknown, windows.

To Reproduce
Steps to reproduce the behavior:

1. git clone --recurse-submodules https://github.com/alire-project/alire.git
2. alr -C alire/ build
3. See error

Expected Behavior
Alr should be built.

alr version
2.0.1

alr logs
If pertinent, paste the output of alr -vv -d <your command> here.

[mosteo]

That's expected behavior, local manifests are strictly checked for variable values, unlike index manifests.

You can override this behavior with --force, but still that should be mentioned in the error.