dump env vars
ZEF_TEST_DEGREE=5
ZEF_FETCH_DEGREE=1
install [IO::URing]
...
/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: IO::URing
Aborting due to build failure: IO::URing:ver<0.2.0>:auth<cpan:GARLANDG> (use --force-build to override)
===> Searching for missing dependencies: NativeHelpers::iovec, Universal::errno
===> Building: IO::URing:ver<0.2.0>:auth<cpan:GARLANDG>
[IO::URing] uringhelper.c:1:10: fatal error: liburing.h: No such file or directory
[IO::URing]     1 | #include <liburing.h>
[IO::URing]       |          ^~~~~~~~~~~~
[IO::URing] compilation terminated.
[IO::URing] make: *** [Makefile:13: resources/libraries/liburinghelper.so] Error 1
===> Building [FAIL]: IO::URing:ver<0.2.0>:auth<cpan:GARLANDG>