dump env vars
ZEF_TEST_DEGREE=1
ZEF_FETCH_DEGREE=1
install [Dan::Polars]
...
/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: Dan::Polars
Aborting due to build failure: Dan::Polars:ver<0.0.3>:auth<zef:librasteve>:api<1> (use --force-build to override)
===> Searching for missing dependencies: Timer
===> Building: Dan::Polars:ver<0.0.3>:auth<zef:librasteve>:api<1>
[Dan::Polars]  Building Rust Polars library (may take a few minutes).
[Dan::Polars]   in method build at /tmp/.zef.1764093599.509276/b5b46670c3cfde19f32765451faa25080fe7472a.tar.gz/dist/Build.pm line 5
[Dan::Polars] An operation first awaited:
[Dan::Polars]   in method build at /tmp/.zef.1764093599.509276/b5b46670c3cfde19f32765451faa25080fe7472a.tar.gz/dist/Build.pm line 9
[Dan::Polars]   in block <unit> at -e line 1
[Dan::Polars] Died with the exception:
[Dan::Polars]     Failed to spawn process cargo: no such file or directory (error code -2)
===> Building [FAIL]: Dan::Polars:ver<0.0.3>:auth<zef:librasteve>:api<1>