checking for UNMANAGED_DEPENDENCIES_MINT... checking for mono... /usr/bin/mono
checking for gmcs... /usr/bin/gmcs
checking for GLIB_SHARP... yes
checking for GTK_SHARP... yes
checking for GNOME_SHARP... configure: error: Package requirements (gnome-sharp-2.0 >= 2.8.0) were not met:

No package 'gnome-sharp-2.0' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables GNOME_SHARP_CFLAGS
and GNOME_SHARP_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.