mupdf build makefile/makerules extraneous text after else directive

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--->  Extracting mupdf-0.9-source.tar.gz
--->  Applying patches to mupdf
--->  Applying /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/graphics/mupdf/files/patch-Makerules.diff
patching file Makerules
--->  Configuring mupdf
--->  Building mupdf
make: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_mupdf/mupdf/work/mupdf-0.9'
Makerules:10: Extraneous text after `else' directive
Makerules:13: Extraneous text after `else' directive
Makerules:13: *** only one `else' per conditional.  Stop.
make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_mupdf/mupdf/work/mupdf-0.9'
shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_mupdf/mupdf/work/mupdf-0.9" && /usr/bin/make -w all " returned error 2
Error: Target org.macports.build returned: shell command failed (see log for details)
Warning: the following items did not execute (for mupdf): org.macports.activate org.macports.build org.macports.destroot org.macports.install

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build directory and log