firehol: UNAME_CMD variable undefined, causing warnings on startup

[entropiabinaria38911-star]

When firehol starts, the following warnings are printed to the console:

/usr/bin/firehol: line 5830: /builddir/.xbps-firehol/wrappers/uname: No such file or directory
/usr/bin/firehol: line 5836: /builddir/.xbps-firehol/wrappers/uname: No such file or directory

Cause:

The firehol script uses a variable UNAME_CMD at lines 5830 and 5836 to detect the kernel version. This variable is never defined anywhere in the installed package (not in /usr/bin/firehol, not in /etc/firehol/, not in /usr/lib/firehol/, not in /usr/share/firehol/). The path /builddir/.xbps-firehol/wrappers/uname is a build-time artifact that does not exist on the installed system.

Expected behavior:
UNAME_CMD should be set to /usr/bin/uname or equivalent before use.
Actual behavior:
UNAME_CMD is undefined, bash expands it to the build-time path, and the command fails with "No such file or directory".
Impact:
Firehol still works correctly despite the warnings, but the output is confusing and suggests a packaging error.

Note:
I may be missing something. If UNAME_CMD is supposed to be defined by the user or through some configuration file that I am not aware of, please let me know. I searched exhaustively in /usr/bin/firehol, /etc/firehol/, /usr/lib/firehol/ and /usr/share/firehol/ and found no definition for this variable. Any clarification is welcome.
Thanks you!