Installation error of required Raku modules on Fedora 42

[ChHaeni]

I guess this should be best addressed to @jnthn

Issue:
Installing two of the necessary Raku modules to run agrammon on Fedora 42 exits with error:
gcc: fatal error: environment variable ‘RPM_ARCH’ not defined .

Temporary fix:
If I define the following env vars with (mostly) arbitrary entries the installation succeeds:

export RPM_ARCH=$(uname -m)
export RPM_PACKAGE_RELEASE=1.0
export RPM_PACKAGE_VERSION=1.0
export RPM_PACKAGE_NAME=qt_gui_cpp

Affected modules:

Digest::SHA1::Native:ver<0.06>
LibXML:ver<0.10.14>:auth<zef:dwarring>:api<0.10.0>

Is this an issue which should be forwarded to the Raku Module maintainers? Or could this be related to my Fedora Raku/zef setup? (Sorry, I have no clue :-D )