diff --git a/racket/src/ChezScheme/LOG b/racket/src/ChezScheme/LOG
index 021f1da332..5e70877942 100644
--- a/racket/src/ChezScheme/LOG
+++ b/racket/src/ChezScheme/LOG
@@ -2207,3 +2207,6 @@
     mats/{5_4,6,7,8,bytevector,examples,foreign}.ms
     mats/{ftype,hash,io,misc,primvars,profile,record}.ms
     mats/Mf-base mats/Mf-*nt mats/mat.ss mats/patch-interpret*
+- escape $(MAKE) to fix parallel mat issue observed with GNU Make 4.2.1:
+  "make[1]: warning: jobserver unavailable: using -j1."
+    mats/Mf-base
diff --git a/racket/src/ChezScheme/mats/Mf-base b/racket/src/ChezScheme/mats/Mf-base
index 458c69f121..a4b9e1a315 100644
--- a/racket/src/ChezScheme/mats/Mf-base
+++ b/racket/src/ChezScheme/mats/Mf-base
@@ -267,9 +267,9 @@ doallcoverage: mat.so
 
 define parallel-config-template
 parallel$(1)-0:
-	-@$(MAKE) allxphelp outdir=output-$(1)-0 objdir=output-$(1)-0 o=0 $(2)
+	-@$$(MAKE) allxphelp outdir=output-$(1)-0 objdir=output-$(1)-0 o=0 $(2)
 parallel$(1)-3:
-	-@$(MAKE) allxphelp outdir=output-$(1)-3 objdir=output-$(1)-3 o=3 $(2)
+	-@$$(MAKE) allxphelp outdir=output-$(1)-3 objdir=output-$(1)-3 o=3 $(2)
 endef
 
 #configs from partialx and allx
@@ -306,9 +306,9 @@ define parallel-target-template
 $(1)-targets: $($(1)-confs:%=parallel%)
 $(1): prettyclean
 	@echo building prereqs with output to Make.out
-	@$(MAKE) parallel-prereqs > Make.out 2>&1
-	@$(MAKE) $(1)-targets
-	$(if $(2),@$(MAKE) $(2))
+	@$$(MAKE) parallel-prereqs > Make.out 2>&1
+	@$$(MAKE) $(1)-targets
+	$(if $(2),@$$(MAKE) $(2))
 	cat $($(1)-confs:%=output-%/summary) > summary && cat summary
 endef