Bug#895540: nx-libs: FTBFS with parallel > 1 due to errors cleaning

[James Clarke <jrtc27@debian.org>]

Source: nx-libs
Version: 3.5.99.16-1
Severity: serious

Hi,
Currently, nx-libs FTBFS (likely only probabilistically) when built with
parallel > 1; this occurred on the ia64 buildd lenz[1], but I have
reproduced it locally in an amd64 cowbuilder chroot.

Please either fix the Makefile dependency issues, or disable parallel
cleaning.

Regards,
James

[1] https://buildd.debian.org/status/fetch.php?pkg=nx-libs&arch=ia64&ver=2%3A3.5.99.16-1%2Bb1&stamp=1523508333&raw=0