dump env vars
ZEF_TEST_DEGREE=5
ZEF_FETCH_DEGREE=1
install [Acme::Cow]
...
/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: Acme::Cow
===SORRY!=== Error while compiling /root/.sparky/.cache/wnvzqauboefjklcgityr.126/.sparrowdo/site#sources/755014C79FE15CAE885101C77EB35D340195D561 (Acme::Cow::Example)
Could not find Acme::Cow:<0.0.5>:auth<zef:lizmat> in:
    /tmp/.zef.1764076649.35026/1764076656.35026.3610.230631940914
    /tmp/whateverable/rakudo-moar/fe0e20c28859ea709eefad19af452c9d35dff20d/share/perl6/site
    /tmp/whateverable/rakudo-moar/fe0e20c28859ea709eefad19af452c9d35dff20d/share/perl6/vendor
    /tmp/whateverable/rakudo-moar/fe0e20c28859ea709eefad19af452c9d35dff20d/share/perl6/core
    CompUnit::Repository::AbsolutePath<3348923431448>
    CompUnit::Repository::NQP<3349010180800>
    CompUnit::Repository::Perl5<3349010180840>
at /root/.sparky/.cache/wnvzqauboefjklcgityr.126/.sparrowdo/site#sources/755014C79FE15CAE885101C77EB35D340195D561 (Acme::Cow::Example):3

===> Staging Acme::Cow:ver<0.0.5>:auth<zef:lizmat>