Disable any parallel build options.
Index: ats2-lang-0.3.13/Makefile_dist
===================================================================
--- ats2-lang-0.3.13.orig/Makefile_dist	2019-11-03 21:12:30.118273000 +0000
+++ ats2-lang-0.3.13/Makefile_dist	2019-11-03 21:12:52.593267000 +0000
@@ -20,7 +20,7 @@
 ######
 
 MAKE=make
-MAKEJ4=make -j4
+MAKEJ4=make
 
 ######
 #
@@ -59,7 +59,7 @@
 ######
 #
 src_patsopt: ; \
-$(MAKE) C3NSTRINTKND=$(C3NSTRINTKND) -j4 -C src patsopt
+$(MAKE) C3NSTRINTKND=$(C3NSTRINTKND) -C src patsopt
 #
 bin_patsopt: src_patsopt ; $(CPF) src/patsopt bin/patsopt
 #
