One of the recent changes to make has caused me problems with parallel
builds of the main tree.  Building without -j <n> works.

Is it affecting anyone else?

Output like:
...
--- install-host-mkdep ---
install ===> tools/host-mkdep
`dependall-compat' was not built (made 2, flags 200f, type 9010201)!
`install-compat' was not built (made 0, flags 2009, type 9010201)!
    `install-compat' has .ORDER dependency against dependall-compat (made 2, flags 200f, type 9010201)
`install-binstall' was not built (made 0, flags 2009, type 9010201)!
    `install-binstall' has .ORDER dependency against dependall-binstall (made 0, flags 300f, type 9010201)
`install-mktemp' was not built (made 0, flags 2009, type 9010201)!
    `install-mktemp' has .ORDER dependency against dependall-mktemp (made 0, flags 300f, type 9010201)
`install-texinfo' was not built (made 0, flags 2009, type 9010201)!
    `install-texinfo' has .ORDER dependency against dependall-texinfo (made 0, flags 300f, type 9010201)
...

Regards,
Geoff