--- Makefiledefault.orig	2023-03-02 09:01:41 UTC
+++ Makefiledefault
@@ -1,7 +1,7 @@
 ifeq ($(MLCOMP)x,x)
 #MLCOMP=mlton @MLton ram-slop 0.7 -- -disable-pass deepFlatten -disable-pass refFlatten
 #MLCOMP=mlton @MLton ram-slop 0.7 -- -disable-pass deepFlatten -disable-pass refFlatten
-MLCOMP=mlton @MLton ram-slop 0.7 -- -drop-pass deepFlatten -drop-pass refFlatten
+MLCOMP=mlton @MLton fixed-heap 4G -- -drop-pass deepFlatten -drop-pass refFlatten
 #mlton @MLton ram-slop 0.7 gc-summary -- -drop-pass deepFlatten -verbose 3
 endif