dump env vars
ZEF_TEST_DEGREE=5
ZEF_FETCH_DEGREE=1
install [Grammar::Highlighter]
...
/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: Grammar::Highlighter
Aborting due to test failure: panda:ver<2016.02> (use --force-test to override)
===> Searching for missing dependencies: panda
===> Staging panda:ver<2016.02>
===> Staging [OK] for panda:ver<2016.02>
===> Staging Grammar::Highlighter:ver<0.1>
===> Staging [OK] for Grammar::Highlighter:ver<0.1>
===> Testing: panda:ver<2016.02>
===> Testing: Grammar::Highlighter:ver<0.1>
===> Testing [OK] for Grammar::Highlighter:ver<0.1>
===> Testing [FAIL]: panda:ver<2016.02>