Mono 2.11.1 build failed

[Team Govs]

gmake[3]: Entering directory `/usr/ports/lang/mono/work/mono-2.11.1/mono/metadata'
../../doltlibtool --quiet --tag=CC   --mode=link cc  -O2 -pipe -fno-strict-aliasing -fno-strict-aliasing -Wdeclaration-after-statement -g -Wall -Wunused -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes  -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wno-cast-qual -Wwrite-strings -Wno-switch-enum -mno-tls-direct-seg-refs  -pthread -o pedump pedump.o libmonoruntime.la ../io-layer/libwapi.la ../utils/libmonoutils.la ../../libgc/libmonogc.la -L../../eglib/src -leglib -lm -lm /usr/local/lib/libiconv.so -Wl,-rpath -Wl,/usr/local/lib  -lm   -pthread
./.libs/libmonoruntime.a(libmonoruntime_la-filewatcher.o): In function `ves_icall_System_IO_InotifyWatcher_AddWatch':
/usr/ports/lang/mono/work/mono-2.11.1/mono/metadata/filewatcher.c:161: undefined reference to `inotify_add_watch'
./.libs/libmonoruntime.a(libmonoruntime_la-filewatcher.o): In function `ves_icall_System_IO_InotifyWatcher_RemoveWatch':
/usr/ports/lang/mono/work/mono-2.11.1/mono/metadata/filewatcher.c:197: undefined reference to `inotify_rm_watch'
./.libs/libmonoruntime.a(libmonoruntime_la-filewatcher.o): In function `ves_icall_System_IO_InotifyWatcher_GetInotifyInstance':
/usr/ports/lang/mono/work/mono-2.11.1/mono/metadata/filewatcher.c:142: undefined reference to `inotify_init'
gmake[3]: *** [pedump] Error 1
gmake[3]: Leaving directory `/usr/ports/lang/mono/work/mono-2.11.1/mono/metadata'
gmake[2]: *** [all-recursive] Error 1
gmake[2]: Leaving directory `/usr/ports/lang/mono/work/mono-2.11.1/mono'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/usr/ports/lang/mono/work/mono-2.11.1'
gmake: *** [all] Error 2
*** Error code 1