openmsx-catapult depends on openmsx (<< 0.8.2). In sid we are, however,
past that version of openmsx:
% rmadison openmsx
openmsx | 0.6.3-2 | lenny | source, alpha, amd64, arm, armel, hppa, i386, ia64, mips, mipsel, powerpc, s390, sparc
openmsx | 0.8.0-1 | squeeze | source, amd64, armel, i386, ia64, kfreebsd-amd64, kfreebsd-i386, mips, mipsel, powerpc, s390, sparc
openmsx | 0.8.2-1 | sid | source, amd64, armel, armhf, hurd-i386, ia64, kfreebsd-amd64, kfreebsd-i386, mips, mipsel, powerpc, s390, s390x, sparc
openmsx | 0.8.2-1+b1 | sid | i386
Hence, openmsx-catapult needs to be updated in order to become installable
again.