diff --git a/BuGS/Makefile b/BuGS/Makefile
index 7f5b34f..8efcd3a 100644
--- a/BuGS/Makefile
+++ b/BuGS/Makefile
@@ -80,7 +80,7 @@ MD_SRCS=Read.Me.md
 # Then, during the copy phase, mySystemFile will be copied into the System
 # folder and a folder newDir will be created and anotherFile will be copied
 # into there.
-COPYDIRS=$(GENDIR)/Teach
+COPYDIRS=
 
 # By default, the build expects that you have GSplus in the path:
 # 	/Applications/GSplus.app/Contents/MacOS/gsplus
diff --git a/BuGS/make/tail.mk b/BuGS/make/tail.mk
index 9a8f954..5995a2c 100644
--- a/BuGS/make/tail.mk
+++ b/BuGS/make/tail.mk
@@ -72,6 +72,9 @@ REZ_DEPS=$(patsubst %.rez, $(OBJDIR)/%.rez.d, $(REZ_SRCS))
 REZ_OBJS=$(patsubst %.rez, $(OBJDIR)/%.r, $(REZ_SRCS))
 
 TEACH_FILES=$(patsubst %.md, $(GENDIR)/Teach/%, $(MD_SRCS))
+ifneq ($(TEACH_FILES),)
+    COPYDIRS+=$(GENDIR)/Teach
+endif
 
 ifneq ($(firstword $(REZ_SRCS)), $(lastword $(REZ_SRCS)))
     $(error Only a single resource file supported, found $(REZ_SRCS))