port astro/stellarium: /usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/AngleMeasure/src/AngleMeasure.hpp, : File name too long,*** Error code 1

Hello,

since a couple of days for now I have on FreeBSD 10.0-CURRENT/amd64,
clang compiled, the following error updating or reinstalling or
installing the port astro/stellarium:

===>  Vulnerability check disabled, database not found
===>  License GPLv2 accepted by the user
===>  Found saved configuration for stellarium-0.11.1
===>  Extracting for stellarium-0.11.1
=> SHA256 Checksum OK for stellarium-0.11.1.tar.gz.
===>  Patching for stellarium-0.11.1
sed:
/usr/ports/astro/stellarium/work/stellarium-0.11.1/src/core/external/fixx11h.h
/usr/ports/astro/stellarium/work/stellarium-0.11.1/src/CMakeLists.txt
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/TelescopeControl/src/TelescopeControl.hpp
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/Oculars/src/Oculars.hpp
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/CompassMarks/src/CompassMarks.hpp
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/TextUserInterface/src/TextUserInterface.hpp
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/Supernovae/src/Supernovae.hpp
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/SolarSystemEditor/src/SolarSystemEditor.hpp
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/Satellites/src/Satellites.hpp
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/HelloStelModule/src/HelloStelModule.hpp
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/TimeZoneConfiguration/src/TimeZoneConfiguration.hpp
/usr/ports/astro/stellarium/work/stellarium-0.11.1/plugins/AngleMeasure/src/AngleMeasure.hpp
: File name too long
*** Error code 1

Stop in /usr/ports/astro/stellarium.
*** Error code 1

I have no idea what the error cuases. I tried to delete everything and
reinstall, but the error seems to be very sticky. I checked the
/usr/ports partition (UFS2, UFS-Journaling on) several time for errors,
but it seems to be clean.

Any ideas what's going on?

Regards,
Oliver