diff --git a/vars/build.vars b/vars/build.vars
index 553c977..dac1f12 100644
--- a/vars/build.vars
+++ b/vars/build.vars
@@ -1058,7 +1058,7 @@ the_silver_searcher toilet tree terminally_tetris ubase which zsh";
 : ${PKG_MKSH_VERSION:=R54};
 : ${PKG_MKSH_URL:=http://pub.allbsd.org/MirOS/dist/mir/mksh/mksh-${PKG_MKSH_VERSION}.tgz};
 : ${PKG_MKSH_BUILD_STEPS_DISABLE:=install_make};
-: ${PKG_MKSH_ENV_VARS_EXTRA:="CC=${DEFAULT_TARGET}-gcc:CFLAGS=${PACKAGES_CFLAGS_CONFIGURE:+${PACKAGES_CFLAGS_CONFIGURE} }-DMKSH_NOPROSPECTOFWORK"};
+: ${PKG_MKSH_ENV_VARS_EXTRA:="CC=${DEFAULT_TARGET}-gcc"};
 : ${PKG_MKSH_IN_TREE:=1};
 : ${PKG_MKSH_INSTALL_FILES:="../mksh/mksh=bin/ /=share/doc/mksh/examples ../mksh/dot.mkshrc=share/doc/mksh/examples/ ../mksh/mksh.1=share/man/man1/"};
 : ${PKG_MKSH_SUBDIR:=mksh};