- $(top_builddir)/pdf/libpdfdocument.la \
- $(top_builddir)/pixbuf/libpixbufdocument.la \
- $(top_builddir)/ps/libgtkgs.la \
- $(NULL)
+ $(top_builddir)/pdf/libpdfdocument.la
+
+if ENABLE_PS
+libevbackend_la_LIBADD += \
+ $(top_builddir)/ps/libpsdocument.la
+endif
+
+if ENABLE_PIXBUF
+libevbackend_la_LIBADD += \
+ $(top_builddir)/pixbuf/libpixbufdocument.la
+endif