dump env vars
ZEF_TEST_DEGREE=1
ZEF_FETCH_DEGREE=1
install [Device::Velleman::K8055]
...
/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: Device::Velleman::K8055
Aborting due to build failure: Device::Velleman::K8055:ver<0.0.6>:auth<zef:jonathanstowe>:api<1.0> (use --force-build to override)
===> Building: Device::Velleman::K8055:ver<0.0.6>:auth<zef:jonathanstowe>:api<1.0>
[Device::Velleman::K8055] k8055.c:131:10: fatal error: libusb-1.0/libusb.h: No such file or directory
[Device::Velleman::K8055]   131 | #include <libusb-1.0/libusb.h>
[Device::Velleman::K8055]       |          ^~~~~~~~~~~~~~~~~~~~~
[Device::Velleman::K8055] compilation terminated.
[Device::Velleman::K8055] make: *** [Makefile:7: libk8055.o] Error 1
===> Building [FAIL]: Device::Velleman::K8055:ver<0.0.6>:auth<zef:jonathanstowe>:api<1.0>