Log Message:
Add MAKE_JOBS_SAFE=no

MAKE_JOBS=22 reliably fails for me, so include the following comment

# MAKE_JOBS=22 failed with:
+# In file included from ../../src/include/postgres.h:46, from chklocale.c:17:
+# ../../src/include/utils/elog.h:79:10: fatal error: utils/errcodes.h: No such \ 
file or directory