dump env vars
ZEF_TEST_DEGREE=5
ZEF_FETCH_DEGREE=1
install [IO::Prompter]
...
/tmp/whateverable/rakudo-moar/fe0e20c28859ea709eefad19af452c9d35dff20d/share/perl6/site/bin/zef
1.0.0
/tmp/whateverable/rakudo-moar/fe0e20c28859ea709eefad19af452c9d35dff20d/bin//raku
Welcome to Rakudo™ v2025.11.
Implementing the Raku® Programming Language v6.d.
Built on MoarVM version 2025.11.
===> Searching for: IO::Prompter
No meta file? Path: /tmp/.zef.1764104696.308658/Testing%3Aver%3C%2A%3E%3Aauth%3Cgithub%3Acolomon%3E.tar.gz
===> Searching for missing dependencies: Testing
===> Extraction: Failed to find a META6.json file for Testing -- failure is likely