Problems upgrading Mercurial

[Peter Kropf]

I'm trying to upgrade my installation of mercurial and get this error:

running build_ext
building 'mercurial.mpatch' extension
creating build/temp.macosx-10.3-i386-2.5
creating build/temp.macosx-10.3-i386-2.5/mercurial
-DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes
-I/opt/local/include/python2.5 -c mercurial/mpatch.c -o
build/temp.macosx-10.3-i386-2.5/mercurial/mpatch.o
unable to execute -DNDEBUG: No such file or directory
error: command '-DNDEBUG' failed with exit status 1
Warning: the following items did not execute (for mercurial):
org.macports.destroot org.macports.build
Error: Unable to upgrade port: 1


Anyone know what's causing this? And possibly a fix?

Thanks!

- Peter