dump env vars
ZEF_TEST_DEGREE=1
ZEF_FETCH_DEGREE=1
install [Concurrent::PChannel]
...
/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: Concurrent::PChannel
Aborting due to test failure: Test::Async:ver<0.1.17>:auth<zef:vrurg>:api<0.1.2> (use --force-test to override)
===> Searching for missing dependencies: Test::Async
===> Staging Test::Async:ver<0.1.17>:auth<zef:vrurg>:api<0.1.2>
===> Staging [OK] for Test::Async:ver<0.1.17>:auth<zef:vrurg>:api<0.1.2>
===> Staging Concurrent::PChannel:ver<0.0.4>:auth<zef:vrurg>:api<0.0.1>
===> Staging [OK] for Concurrent::PChannel:ver<0.0.4>:auth<zef:vrurg>:api<0.0.1>
===> Testing: Test::Async:ver<0.1.17>:auth<zef:vrurg>:api<0.1.2>
===> Testing [FAIL]: Test::Async:ver<0.1.17>:auth<zef:vrurg>:api<0.1.2>