dump env vars
ZEF_TEST_DEGREE=1
ZEF_FETCH_DEGREE=1
install [Bitcoin::Core::Secp256k1]
...
/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::Core::Secp256k1
===SORRY!===
Bitcoin::Core::Secp256k1::Exception::X::Library: Cannot find secp256k1 shared library

===> Searching for missing dependencies: Test::Mock
===> Searching for missing dependencies: Method::Protected:ver<0.0.4+>:auth<zef:lizmat>
===> Staging Method::Protected:ver<0.0.4>:auth<zef:lizmat>
===> Staging [OK] for Method::Protected:ver<0.0.4>:auth<zef:lizmat>
===> Staging Test::Mock:ver<1.8>:auth<zef:raku-community-modules>
===> Staging [OK] for Test::Mock:ver<1.8>:auth<zef:raku-community-modules>
===> Staging Bitcoin::Core::Secp256k1:ver<0.0.25>:auth<zef:knarkhov>