dump env vars
ZEF_TEST_DEGREE=1
ZEF_FETCH_DEGREE=1
install [Bitcoin::RPC::Client]
...
/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: Bitcoin::RPC::Client
===SORRY!=== Error while compiling /root/.sparky/.cache/lasfgxphkqmdynjirowb.126/.sparrowdo/site#sources/9114319CF31260C3DF8A35FB07FEDE63055B60AF (Bitcoin::Helpers::Config)
Too late to switch language version. Must be used as the very first statement.
at /root/.sparky/.cache/lasfgxphkqmdynjirowb.126/.sparrowdo/site#sources/9114319CF31260C3DF8A35FB07FEDE63055B60AF (Bitcoin::Helpers::Config):3
------> use v6<HERE>;

===> Searching for missing dependencies: WWW, Data::Dump, Slippy::Semilist
===> Searching for missing dependencies: HTTP::UserAgent
===> Searching for missing dependencies: HTTP::Status, Encode, IO::Capture::Simple, Test::Util::ServerPort
===> Staging HTTP::Status:ver<0.0.5>:auth<zef:lizmat>
===> Staging [OK] for HTTP::Status:ver<0.0.5>:auth<zef:lizmat>
===> Staging Encode:ver<0.0.4>
===> Staging [OK] for Encode:ver<0.0.4>
===> Staging IO::Capture::Simple:ver<v.0.0.2>:auth<zef:jjmerelo>
===> Staging [OK] for IO::Capture::Simple:ver<v.0.0.2>:auth<zef:jjmerelo>
===> Staging Test::Util::ServerPort:ver<0.0.5>:auth<zef:jonathanstowe>:api<1.0>
===> Staging [OK] for Test::Util::ServerPort:ver<0.0.5>:auth<zef:jonathanstowe>:api<1.0>
===> Staging HTTP::UserAgent:ver<1.2.0>:auth<zef:raku-community-modules>
===> Staging [OK] for HTTP::UserAgent:ver<1.2.0>:auth<zef:raku-community-modules>
===> Staging WWW:ver<1.005007>:auth<zef:raku-community-modules>
===> Staging [OK] for WWW:ver<1.005007>:auth<zef:raku-community-modules>
===> Staging Data::Dump:ver<0.0.16>:auth<zef:tony-o>
===> Staging [OK] for Data::Dump:ver<0.0.16>:auth<zef:tony-o>
===> Staging Slippy::Semilist:ver<0.0.2>:auth<github:gfldex>
===> Staging [OK] for Slippy::Semilist:ver<0.0.2>:auth<github:gfldex>
===> Staging Bitcoin::RPC::Client:ver<0.0.2>