Alpine has build error on Lion

[david@…]

Alpine fails to build pith/util.h, with the following error:

make[4]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_mail_alpine/alpine/work/alpine-2.00/pith'
/Developer/usr/bin/clang -DHAVE_CONFIG_H   -I../include -I../include -I/opt/local/include -I/opt/local/include -I/opt/local/include -g -D_THREAD_SAFE  -Dbsd -pipe -O2 -arch x86_64 -MT ablookup.o -MD -MP -MF .deps/ablookup.Tpo -c -o ablookup.o ablookup.c
In file included from ablookup.c:20:
./../pith/util.h:59:8: error: conflicting types for 'panic'
void      panic(char *);
          ^
/usr/include/mach/mach.h:86:15: note: previous declaration is here
extern void                     panic(const char *, ...);
                                ^
1 error generated.