diff --git a/source-builder/config/glib-2-1.cfg b/source-builder/config/glib-2-1.cfg
index b5c6dd1..7e0987b 100644
--- a/source-builder/config/glib-2-1.cfg
+++ b/source-builder/config/glib-2-1.cfg
@@ -55,7 +55,7 @@ Source0: http://ftp.gnome.org/pub/gnome/sources/glib/%{glib_version_major}/glib-
   SYSROOT=$SB_TMPPREFIX
 
   PKG_CONFIG_PATH=$SYSROOT \
-  PKG_CONFIG_SYSROOT_DIR=$SB_TMPROOT \
+  PKG_CONFIG_BUILD_TOP_DIR=$SB_TMPROOT \
   %{_ld_library_path}=$SYSROOT/lib \
   ../${source_dir_0}/configure \
     --prefix=%{_prefix} \