Building LODE on Mac fails with "Too many open files"

Hi there,

I'm trying to set up LODE on the latest Mac OS X with newest Xcode, following
the instructions here ("Quick Pre-canned Setup"):
https://wiki.documentfoundation.org/Development/BuildingOnMac

After running "make", the build process fails after a couple of hours with the
following error:

[build DEP] SRS:avmedia/res
[build DEP] SRS:acc/res
[...]/lode/dev/core/external//apache-commons/Module_apache-commons.mk:12: 
[...]/lode/dev/core/external/apache-
commons/ExternalPackage_apache_commons_logging.mk: Too many open files
[...]/lode/dev/core/external//apache-commons/Module_apache-commons.mk:12: ***
No target registered while reading [...]/lode/dev/core/external/apache-
commons/ExternalPackage_apache_commons_logging.mk!.  Stop.
make: *** [build] Error 2

I already increased the ulimit settings to no avail:

$ launchctl limit maxfiles
        maxfiles    524288         524288         

During the build process, lsof reports an enormous amount of PIPE entries,
here's what I'm getting about an hour after running "make":

$ lsof | grep make | grep PIPE | wc -l
   31933

and it keeps growing.

Any idea how this can be fixed? Thanks

Ralf