Separate from operating system.

Some variables might be present, which can influcence the compilation.

component/ncurses/buildout.cfg

@@ -17,5 +17,9 @@ make-targets =
   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
+  CFLAGS =
+  CPPFLAGS =
+  LDFLAGS =
+  LD_LIBRARY_PATH =
 make-options =
   -j1