Force link creation in order to not die in case of its existence.

slapos/profile/ncurses.cfg

@@ -14,6 +14,6 @@ configure-options =
   --enable-rpath
 # tricky way to rerun with --enable-widec
 make-targets =
-  install && (for i in curses unctrl eti form menu panel term; do ln -s ncurses/$i.h ${buildout:parts-directory}/${:_buildout_section_name_}/include/$i.h; done) && ./configure ${:configure-options} --enable-widec && make install
+  install && (for i in curses unctrl eti form menu panel term; do ln -sf ncurses/$i.h ${buildout:parts-directory}/${:_buildout_section_name_}/include/$i.h; done) && ./configure ${:configure-options} --enable-widec && make install
 environment =
   LDFLAGS =-Wl,--as-needed