1 files changed, 4 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index d6ca030..f254d97 100644
--- a/Makefile
+++ b/Makefile
@@ -34,8 +34,10 @@ native: ctlm cttei geminict
 cand_a = $(word 1,$(subst -, ,$1))
 cand_b = $(word 2,$(subst -, ,$1))
 
-.PHONY: selfplay-%
-selfplay-%:
+# .PHONY on the pattern alone does not force the recipe when the binary
+# already exists; the FORCE prerequisite does
+.PHONY: selfplay-% FORCE
+selfplay-%: FORCE
 	rm -f selfplay-%
 	rm -f src/*.o include/negamax.o include/pv.o include/tt.o
 	$(MAKE) SELFPLAY_OUT=$@ \