diff -pruN fontconfig-2.12.91.orig/configure.ac fontconfig-2.12.91/configure.ac
--- fontconfig-2.12.91.orig/configure.ac	2017-12-14 15:44:20.000000000 +0900
+++ fontconfig-2.12.91/configure.ac	2017-12-22 16:20:11.556717785 +0900
@@ -314,7 +314,7 @@ AC_DEFINE_UNQUOTED(USE_ICONV,$use_iconv,
 # Checks for FreeType
 #
 dnl See http://git.savannah.gnu.org/cgit/freetype/freetype2.git/tree/docs/VERSIONS.TXT for versioning in freetype
-PKG_CHECK_MODULES(FREETYPE, freetype2 >= 21.0.15)
+PKG_CHECK_MODULES(FREETYPE, freetype2 >= 20.0.14)
 PKGCONFIG_REQUIRES="$PKGCONFIG_REQUIRES freetype2"
 
 AC_SUBST(FREETYPE_LIBS)