error with package

[Gideon Simpson]

Got this recently when upgrading outdated packages:

--->  Computing dependencies for glib2
--->  Fetching archive for glib2
--->  Attempting to fetch glib2-2.32.3_0.darwin_11.x86_64.tbz2 from http://packages.macports.org/glib2
--->  Attempting to fetch glib2-2.32.3_0.darwin_11.x86_64.tbz2.rmd160 from http://packages.macports.org/glib2
--->  Installing glib2 @2.32.3_0
--->  Cleaning glib2
--->  Computing dependencies for glib2
--->  Deactivating glib2 @2.32.2_0
--->  Cleaning glib2
--->  Activating glib2 @2.32.3_0
--->  Cleaning glib2
--->  Computing dependencies for cloog
--->  Dependencies to be installed: isl
--->  Activating isl @0.07_0
Error: org.macports.activate for port isl returned: Image error: /opt/local/include/isl/aff.h is being used by the active cloog port.  Please deactivate this port first, or use 'port -f activate isl' to force the activation.
Error: Failed to install isl
Please see the log file for port isl for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_isl/isl/main.log
Error: The following dependencies were not installed: isl
Error: Unable to upgrade port: 1
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    http://guide.macports.org/#project.tickets