--- make/build.sh.orig	Sat Nov 12 19:01:28 2022
+++ make/build.sh	Sat Nov 12 19:01:36 2022
@@ -910,7 +910,7 @@
 
 # Build jtreg
 cd "${ROOT}/make"
-make ANT="${ANT}"                                             \
+gmake -j${JOBS} ANT="${ANT}"                                  \
      ANT_JAR="$(mixed_path "${ANT_JAR}")"                     \
      ASMTOOLS_JAR="${ASMTOOLS_JAR}"                           \
      ASMTOOLS_LICENSE="${ASMTOOLS_LICENSE}"                   \