diff --git a/src/mzscheme/Makefile.in b/src/mzscheme/Makefile.in
index b1c4e1e2a2..8d473403ba 100644
--- a/src/mzscheme/Makefile.in
+++ b/src/mzscheme/Makefile.in
@@ -68,6 +68,10 @@ cgc:
 	cd dynsrc; $(MAKE) dynlib3m
 	cd gc2; $(MAKE) ../mzscheme@MMM@
 
+compact:
+	$(MAKE) 3m
+	cd gc2; $(MAKE) ../mzscheme_compact_gc
+
 both:
 	$(MAKE) cgc
 	$(MAKE) 3m
diff --git a/src/mzscheme/gc2/Makefile.in b/src/mzscheme/gc2/Makefile.in
index 11ebe9a73b..0fc6851f72 100644
--- a/src/mzscheme/gc2/Makefile.in
+++ b/src/mzscheme/gc2/Makefile.in
@@ -93,7 +93,6 @@ XSRCS = $(XSRCDIR)/salloc.c \
 	$(XSRCDIR)/fun.c \
 	$(XSRCDIR)/hash.c \
 	$(XSRCDIR)/jit.c \
-	$(XSRCDIR)/jit_compact_gc.c \
 	$(XSRCDIR)/list.c \
 	$(XSRCDIR)/module.c \
 	$(XSRCDIR)/network.c \
@@ -125,7 +124,6 @@ all: xsrc
 	$(MAKE) $(XSRCDIR)/precomp.h
 	$(MAKE) xobjects
 	$(MAKE) ../mzscheme3m
-	$(MAKE) ../mzscheme_compact_gc
 
 xsrcs: $(XSRCS)
 
@@ -170,10 +168,6 @@ $(XSRCDIR)/hash.c: ../src/hash.@LTO@ $(XFORMDEP)
 	$(XFORM) $(XSRCDIR)/hash.c $(SRCDIR)/hash.c
 $(XSRCDIR)/jit.c: ../src/jit.@LTO@ $(XFORMDEP)
 	$(XFORM) $(XSRCDIR)/jit.c $(SRCDIR)/jit.c
-
-$(XSRCDIR)/jit_compact_gc.c: ../src/jit.@LTO@ $(XFORMDEP)
-	$(XFORM_COMPACT_GC) $(XSRCDIR)/jit_compact_gc.c $(SRCDIR)/jit.c
-
 $(XSRCDIR)/module.c: ../src/module.@LTO@ $(XFORMDEP)
 	$(XFORM) $(XSRCDIR)/module.c $(SRCDIR)/module.c
 $(XSRCDIR)/list.c: ../src/list.@LTO@ $(XFORMDEP)
@@ -227,6 +221,8 @@ $(XSRCDIR)/foreign.c: ../../foreign/foreign.@LTO@ $(XFORMDEP)
 $(XSRCDIR)/main.c: ../main.@LTO@ $(XFORMDEP)
 	$(XFORM_NOPRECOMP) $(XSRCDIR)/main.c $(DEF_COLLECTS_DIR) $(srcdir)/../main.c
 
+$(XSRCDIR)/jit_compact_gc.c: ../src/jit.@LTO@ $(XFORMDEP)
+	$(XFORM_COMPACT_GC) $(XSRCDIR)/jit_compact_gc.c $(SRCDIR)/jit.c
 
 salloc.@LTO@: $(XSRCDIR)/salloc.c
 	$(CC) $(CFLAGS) -c $(XSRCDIR)/salloc.c -o salloc.@LTO@
@@ -391,7 +387,7 @@ $(MZFWMMM): ../libmzscheme3m.@LIBSFX@
 	/usr/bin/install_name_tool -change "PLT_MzScheme.framework/Versions/$(FWVERSION)_3m/PLT_MzScheme" "@executable_path/PLT_MzScheme.framework/Versions/$(FWVERSION)_3m/PLT_MzScheme" "../mzscheme@MMM@"
 
 ../mzscheme_compact_gc@OSX@:
-	echo "../mzscheme_compact_gc not currently build on OSX"
+	echo "../mzscheme_compact_gc does not currently build on Mac OS X; use --enable-compact with configure, instead"
 
 clean:
 	/bin/rm -f ../mzscheme@MMM@ *.@LTO@ $(XSRCDIR)/*
diff --git a/src/mzscheme/src/list.c b/src/mzscheme/src/list.c
index df6225c720..fddc9162e7 100644
--- a/src/mzscheme/src/list.c
+++ b/src/mzscheme/src/list.c
@@ -1002,7 +1002,7 @@ list_p_prim (int argc, Scheme_Object *argv[])
 
 #define LIST_BODY(INIT)                          \
   int i;                                         \
-  Scheme_Object *l;                              \
+  GC_CAN_IGNORE Scheme_Object *l;                \
   INIT;                                          \
   for (i = argc ; i--; ) {                       \
     l = cons(argv[i], l);                        \