Lexis build system: Parallel build issue

[adevress]

When executed on fast machines and with a make -j quite aggressive ( -j 32 ), the build system of Lexis fails with a duplicated file error related to a code generation issue.

Please find the job log below.

-- Looking for pthread_create in pthread
-- Build files have been written to: /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build
building
make flags: SHELL=/homec/bp0/bp000022/nix-x86_64/store/store/9rqqk1zmcvvd6kiiz7zwlyfbylpyh8wz-bash-4.3-p42/bin/bash
[ 2%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/render/viewport.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/render
[ 4%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/data/progress.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/data/detail
[ 7%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/render/imageJPEG.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/render
[ 9%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/data/cellSetBinaryOp.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/data
[ 12%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/render/stream.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/render
[ 17%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/data/frameRange.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/data
[ 17%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/render/lookOut.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/render
[ 19%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/render/frame.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/render
[ 21%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/data/selections.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/data
[ 24%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/render/histogram.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/render/detail
[ 26%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/render/clipPlanes.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/render/detail
[ 29%] Building zerobuf C++ headers for /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/lexis/render/materialLUT.fbs in /tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/render
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
Traceback (most recent call last):
File "/homec/bp0/bp000022/nix-x86_64/store/store/s00yvkxxxx0vxh0ifpnliy658l5168cg-zerobuf-0.5-dev201708/bin/zerobufCxx.py", line 1632, in
os.makedirs( args.outputdir )
File "/homec/bp0/bp000022/nix-x86_64/store/store/650pk416lpxly45m9v913kryy27hwvhd-python-2.7.11-env/lib/python2.7/os.py", line 157, in makedirs
mkdir(name, mode)
OSError: [Errno 17] File exists: '/tmp/nix-build-lexis-1.2.0-2017.06.drv-0/Lexis-a4e458a/build/include/lexis/render'
lexis/CMakeFiles/Lexis.dir/build.make:142: recipe for target 'include/lexis/render/stream.h' failed
make[2]: *** [include/lexis/render/stream.h] Error 1
make[2]: *** Waiting for unfinished jobs....