dump env vars
ZEF_TEST_DEGREE=5
ZEF_FETCH_DEGREE=1
install [Gumbo]
...
/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: Gumbo
Aborting due to test failure: Gumbo:ver<1.0> (use --force-test to override)
===> Searching for missing dependencies: XML
===> Staging XML:ver<0.3.6>:auth<zef:raku-community-modules>
===> Staging [OK] for XML:ver<0.3.6>:auth<zef:raku-community-modules>
===> Staging Gumbo:ver<1.0>
===> Staging [OK] for Gumbo:ver<1.0>
===> Testing: XML:ver<0.3.6>:auth<zef:raku-community-modules>
===> Testing: Gumbo:ver<1.0>
[Gumbo] Cannot locate native library 'libgumbo.so.1': libgumbo.so.1: cannot open shared object file: No such file or directory
[Gumbo]   in met
[Gumbo] hod setup at /tmp/whateverable/rakudo-moar/fe0e20c28859ea709eefad19af452c9d35dff20d/share/perl6/core/sources/9B3C3C2CD58DB40487146B95E1C2B56C1A96FF0E (NativeCall) line 359
[Gumbo]   in method setup at /tmp/whateverable/rakudo-moar/fe0e20c28859ea709eefad19af452c9d3
[Gumbo] 5dff20d/share/perl6/core/sources/9B3C3C2CD58DB40487146B95E1C2B56C1A96FF0E (NativeCall) line 399
[Gumbo]   in sub raku-nativecall at /tmp/whateverable/rakudo-moar/fe0e20c28859ea709eefad19af452c9d35dff20d/share/perl6/core/sources/99F672B89ED8ED046771E2A225F434F99E4E6EF4 (NativeCall::Dispatcher) line 51
[Gumbo]   in method parse at /tmp/whateverable/rakudo-moar/fe0e20c28859ea709eefad19af452c9d35dff20d/share/perl6/site/sources/ABD0E7E3EB81D9BDDD695CBEA9F9F20EE57726AF (Gumbo::Parser) line 22
[Gumbo]   in sub parse-html at /tmp/whatever
[Gumbo] able/rakudo-moar/fe0e20c28859ea709eefad19af452c9d35dff20d/share/perl6/site/sources/B99FB759108FA22127A6E8C2F4166524304F5CE2 (Gumbo) line 136
[Gumbo]   in block <unit> at t/01_basic.t line 21
[Gumbo] 
===> Testing [FAIL]: Gumbo:ver<1.0>