dump env vars
ZEF_TEST_DEGREE=5
ZEF_FETCH_DEGREE=1
install [Adventure::Engine]
...
/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: Adventure::Engine
No meta file? Path: /tmp/.zef.1764077329.48157/Adventure%3A%3AEngine%3Aver%3C0.4.0%3E%3Aauth%3Cgithub%3Amasak%3E.tar.gz
===> Extraction: Failed to find a META6.json file for Adventure::Engine:ver<0.4.0> -- failure is likely