As mkbootdisk package is ExclusiveArch, there is no package for AMD64 platform. As there is a possibility to build boot ISO file, there is no reason to exclude this package from other platforms (I have no FDD on my current servers but CD-ROM). Please apply next patch and remove arch restriction from SPEC file. The patch print out error message for x86_64 and disallow a creation of bootdisk on FDD. There should be probably a test for 2.88MB floppies too. I tested mkbootdisk-1.5.1-1 from FC1 and RHEL3.
Created attachment 96466 [details] Forcing ISO bootdisk on x86_64 (AMD64)
As this package is pure shell script it can be build as noarch. Add BuildArch: noarch to SPEC file and make conditions for different architectures like patch above.
fixed in mkbootdisk-1.5.2-6