Unison installation fails

[maggesi@…]

Installation of Unison fails during staging. The error reported by the log file /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_net_unison/unison/main.log follows. Thanks.

:info:destroot ocamlopt -verbose -I lwt -I ubase -I system -I system/generic -I lwt/generic -ccopt -mmacosx-version-min=10.5 -I +lablgtk2 -o unison unix.cmxa str.cmxa bigarray.cmxa lablgtk.cmxa ubase/rx.cmx unicode_tables.cmx unicode.cmx bytearray.cmx system/system_generic.cmx system/generic/system_impl.cmx system.cmx ubase/projectInfo.cmx ubase/myMap.cmx ubase/safelist.cmx ubase/uprintf.cmx ubase/util.cmx ubase/uarg.cmx ubase/prefs.cmx ubase/trace.cmx ubase/proplist.cmx lwt/pqueue.cmx lwt/lwt.cmx lwt/lwt_util.cmx lwt/generic/lwt_unix_impl.cmx lwt/lwt_unix.cmx case.cmx pred.cmx uutil.cmx fileutil.cmx name.cmx path.cmx fspath.cmx fs.cmx fingerprint.cmx abort.cmx osx.cmx external.cmx props.cmx fileinfo.cmx os.cmx lock.cmx clroot.cmx common.cmx tree.cmx checksum.cmx terminal.cmx transfer.cmx xferhint.cmx remote.cmx globals.cmx fpcache.cmx update.cmx copy.cmx stasher.cmx files.cmx sortri.cmx recon.cmx transport.cmx strings.cmx uicommon.cmx uitext.cmx test.cmx main.cmx pixmaps.cmx uigtk2.cmx linkgtk2.cmx osxsupport.o pty.o bytearray_stubs.o :info:destroot File "_none_", line 1, characters 0-1: :info:destroot Error: Files uigtk2.cmx and /opt/local/lib/ocaml/lablgtk2/lablgtk.cmxa :info:destroot make inconsistent assumptions over implementation GtkSignal :info:destroot make: * [unison] Error 2 :info:destroot make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_net_unison/unison/work/unison-2.40.63' :info:destroot Command failed: cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_net_unison/unison/work/unison-2.40.63" && /usr/bin/make -w install PREFIX=/opt/local NATIVE=true THREADS