Random parallel build failures

[Apteryks]

Hi,

The build of nx-libs appears to suffer from non-deterministic build failures when parallelized (make -jN). Here's an example:

making all in programs/Xserver...
make[6]: Entering directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs'
make[6]: warning: -j24 forced in submake: resetting jobserver mode.
making all in programs/Xserver/include...
making all in programs/Xserver/dix...
making all in programs/Xserver/os...
making all in programs/Xserver/mi...
making all in programs/Xserver/Xext...
making all in programs/Xserver/Xi...
making all in programs/Xserver/xkb...
making all in programs/Xserver/GL...
making all in programs/Xserver/dbe...
make[7]: Entering directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs/Xserver'
make[7]: warning: -j24 forced in submake: resetting jobserver mode.
making all in programs/Xserver/record...
make[7]: Nothing to be done for 'all'.
make[7]: Leaving directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs/Xserver/include
'
making all in programs/Xserver/randr...
make[7]: Entering directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs/Xserver'
make[7]: warning: -j24 forced in submake: resetting jobserver mode.
make[7]: Entering directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs/Xserver'
make[7]: warning: -j24 forced in submake: resetting jobserver mode.
making all in programs/Xserver/render...
make[7]: Entering directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs/Xserver'
make[7]: warning: -j24 forced in submake: resetting jobserver mode.
make[7]: Entering directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs/Xserver'
make[7]: warning: -j24 forced in submake: resetting jobserver mode.
making all in programs/Xserver/xfixes...
make[7]: Entering directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs/Xserver'
make[7]: warning: -j24 forced in submake: resetting jobserver mode.
making all in programs/Xserver/damageext...
make[7]: Entering directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs/Xserver'
make[7]: warning: -j24 forced in submake: resetting jobserver mode.
make[7]: *** No rule to make target 'all'.  Stop.
make[7]: Leaving directory '/tmp/guix-build-nx-libs-3.5.99.27.drv-0/source/nx-X11/programs/Xserver/os'
making all in programs/Xserver/miext/cw...
make[6]: *** [Makefile:682: os] Error 2
make[6]: *** Waiting for unfinished jobs....

It'd be nice if it worked normally. I also not that parallel build is disabled in the Debian rules file (--no-parallel).