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RuntimeError when starting pari/library not found


I am using a binary distribution of sage 7.1 for debian jessie and "installed" it to /opt.

Now, when I want to use pari, I get a runtime error: sage: %gp --> Switching to PARI/GP interpreter <-- pari: sqrt(4) RuntimeError: unable to start pari

The full backtrace can be found here:

however, the following works: LD_LIBRARY_PATH=/opt/sage-7.1/local/lib sage It seems that sage is unable to find that library when starting pari.

Setting SAGE_ROOT does not help. Did I miss some configuration file to set the library path for sage?