diff --git a/build/GNUbasegcc.mk b/build/GNUbasegcc.mk
index 552394e0..6dca4e5b 100644
--- a/build/GNUbasegcc.mk
+++ b/build/GNUbasegcc.mk
@@ -53,7 +53,7 @@ endif
 $(OUT): $(OFILES) | $(OUTDIR)
 	@$(reallinker) -o $(OUT) $(OFILES) $(LDFLAGS)
 ifeq ($(USESSONAME),1)
-	@ln -s $(NAME)$(SUFFIX) $(OUTNOSONAME)
+	@ln -sf $(NAME)$(SUFFIX) $(OUTNOSONAME)
 endif
 	@echo ====== Linked $(OUT)
 
diff --git a/darwin/map.m b/darwin/map.m
index 968a86f9..a66d0cd2 100644
--- a/darwin/map.m
+++ b/darwin/map.m
@@ -1,8 +1,6 @@
 // 17 august 2015
 #import "uipriv_darwin.h"
 
-// TODO are the NSValues (or worse, the NSMapTable) being garbage collected underfoot? crash the package ui test when closing the main window; etc.
-
 // unfortunately NSMutableDictionary copies its keys, meaning we can't use it for pointers
 // hence, this file
 // we could expose a NSMapTable directly, but let's treat all pointers as opaque and hide the implementation, just to be safe and prevent even more rewrites later
@@ -17,6 +15,8 @@ struct mapTable *newMap(void)
 	m = uiNew(struct mapTable);
 	m->m = [NSMapTable mapTableWithKeyOptions:(NSPointerFunctionsOpaqueMemory | NSPointerFunctionsOpaquePersonality)
 		valueOptions:(NSPointerFunctionsOpaqueMemory | NSPointerFunctionsOpaquePersonality)];
+	// TODO why do I need this
+	[m->m retain];
 	return m;
 }