[Linux] multimedia/libass looks for library in /lib which is in /usr/lib

[Mayuresh <mayuresh%acm.org@localhost>]

I get the following error on Debian 8, i386:

/bin/grep:
/usr/pkgsrc/multimedia/libass/work/.buildlink/lib/i386-linux-gnu/libexpat.la:
No such file or directory
/bin/sed: can't read
/usr/pkgsrc/multimedia/libass/work/.buildlink/lib/i386-linux-gnu/libexpat.la:
No such file or directory
libtool:   error:
'/usr/pkgsrc/multimedia/libass/work/.buildlink/lib/i386-linux-gnu/libexpat.la'
is not a valid libtool archive
*** [libass.la] Error code 1


On this system libexpat.la is present under /usr/lib, though it is looking
for it in /lib. What could be a way to fix this?

Mayuresh