--- src/httpd/configure.orig	2017-02-01 03:41:52 UTC
+++ src/httpd/configure
@@ -97,7 +97,7 @@ if [ "${GROONGA_HTTPD_WITH_MRUBY}" = "ye
   ./configure --with-ngx-src-root=${nginx_directory} \
     --with-mruby-incdir="${mruby_directory}/src ${mruby_directory}/include" \
     --with-mruby-libdir=${libmruby_directory}
-  make generate_gems_config
+  gmake generate_gems_config
   configure_args="${configure_args} --add-module=${nginx_mruby_directory}/dependence/ngx_devel_kit --add-module=${nginx_mruby_directory}"
 fi