diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index 3c0c92b..1e1b243 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -1048,9 +1048,9 @@
 clean:
 	-$(DEL) $(OUTDIR)$(DIRSLASH)*.o
 	-$(DEL) $(OUTDIR)$(DIRSLASH)*.res
+	-$(DEL) $(OUTDIR)$(DIRSLASH)pathdef.c
 	-rmdir $(OUTDIR)
 	-$(DEL) $(MAIN_TARGET) vimrun.exe install.exe uninstal.exe
-	-$(DEL) pathdef.c
 ifdef PERL
 	-$(DEL) if_perl.c
 	-$(DEL) auto$(DIRSLASH)if_perl.c
@@ -1072,6 +1072,8 @@
 endif
 CUI_INCL = iscygpty.h
 
+PATHDEF_SRC = $(OUTDIR)/pathdef.c
+
 $(OUTDIR)/if_python.o:	if_python.c if_py_both.h $(INCL)
 	$(CC) -c $(CFLAGS) $(PYTHONINC) $(PYTHON_HOME_DEF) $< -o $@
 
@@ -1171,6 +1173,9 @@
 $(OUTDIR)/terminal.o:	terminal.c $(INCL) $(TERM_DEPS)
 	$(CC) -c $(CFLAGS) terminal.c -o $@
 
+$(OUTDIR)/pathdef.o:	$(PATHDEF_SRC) $(INCL)
+	$(CC) -c $(CFLAGS) $(PATHDEF_SRC) -o $@
+
 
 CCCTERM = $(CC) -c $(CFLAGS) -Ilibvterm/include -DINLINE="" \
 	  -DVSNPRINTF=vim_vsnprintf \
@@ -1185,27 +1190,27 @@
 	$(CC) -c $(CFLAGS) $< -o $@
 
 
-pathdef.c: $(INCL)
+$(PATHDEF_SRC): Make_cyg_ming.mak Make_cyg.mak Make_ming.mak
 ifneq (sh.exe, $(SHELL))
-	@echo creating pathdef.c
-	@echo '/* pathdef.c */' > pathdef.c
-	@echo '#include "vim.h"' >> pathdef.c
-	@echo 'char_u *default_vim_dir = (char_u *)"$(VIMRCLOC)";' >> pathdef.c
-	@echo 'char_u *default_vimruntime_dir = (char_u *)"$(VIMRUNTIMEDIR)";' >> pathdef.c
-	@echo 'char_u *all_cflags = (char_u *)"$(CC) $(CFLAGS)";' >> pathdef.c
-	@echo 'char_u *all_lflags = (char_u *)"$(LINK) $(CFLAGS) $(LFLAGS) -o $(TARGET) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB)";' >> pathdef.c
-	@echo 'char_u *compiled_user = (char_u *)"$(USERNAME)";' >> pathdef.c
-	@echo 'char_u *compiled_sys = (char_u *)"$(USERDOMAIN)";' >> pathdef.c
+	@echo creating $(PATHDEF_SRC)
+	@echo '/* pathdef.c */' > $(PATHDEF_SRC)
+	@echo '#include "vim.h"' >> $(PATHDEF_SRC)
+	@echo 'char_u *default_vim_dir = (char_u *)"$(VIMRCLOC)";' >> $(PATHDEF_SRC)
+	@echo 'char_u *default_vimruntime_dir = (char_u *)"$(VIMRUNTIMEDIR)";' >> $(PATHDEF_SRC)
+	@echo 'char_u *all_cflags = (char_u *)"$(CC) $(CFLAGS)";' >> $(PATHDEF_SRC)
+	@echo 'char_u *all_lflags = (char_u *)"$(LINK) $(CFLAGS) $(LFLAGS) -o $(TARGET) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB)";' >> $(PATHDEF_SRC)
+	@echo 'char_u *compiled_user = (char_u *)"$(USERNAME)";' >> $(PATHDEF_SRC)
+	@echo 'char_u *compiled_sys = (char_u *)"$(USERDOMAIN)";' >> $(PATHDEF_SRC)
 else
-	@echo creating pathdef.c
-	@echo /* pathdef.c */ > pathdef.c
-	@echo #include "vim.h" >> pathdef.c
-	@echo char_u *default_vim_dir = (char_u *)"$(VIMRCLOC)"; >> pathdef.c
-	@echo char_u *default_vimruntime_dir = (char_u *)"$(VIMRUNTIMEDIR)"; >> pathdef.c
-	@echo char_u *all_cflags = (char_u *)"$(CC) $(CFLAGS)"; >> pathdef.c
-	@echo char_u *all_lflags = (char_u *)"$(CC) $(CFLAGS) $(LFLAGS) -o $(TARGET) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB)"; >> pathdef.c
-	@echo char_u *compiled_user = (char_u *)"$(USERNAME)"; >> pathdef.c
-	@echo char_u *compiled_sys = (char_u *)"$(USERDOMAIN)"; >> pathdef.c
+	@echo creating $(PATHDEF_SRC)
+	@echo /* pathdef.c */ > $(PATHDEF_SRC)
+	@echo #include "vim.h" >> $(PATHDEF_SRC)
+	@echo char_u *default_vim_dir = (char_u *)"$(VIMRCLOC)"; >> $(PATHDEF_SRC)
+	@echo char_u *default_vimruntime_dir = (char_u *)"$(VIMRUNTIMEDIR)"; >> $(PATHDEF_SRC)
+	@echo char_u *all_cflags = (char_u *)"$(CC) $(CFLAGS)"; >> $(PATHDEF_SRC)
+	@echo char_u *all_lflags = (char_u *)"$(CC) $(CFLAGS) $(LFLAGS) -o $(TARGET) $(LIB) -lole32 -luuid $(LUA_LIB) $(MZSCHEME_LIBDIR) $(MZSCHEME_LIB) $(PYTHONLIB) $(PYTHON3LIB) $(RUBYLIB)"; >> $(PATHDEF_SRC)
+	@echo char_u *compiled_user = (char_u *)"$(USERNAME)"; >> $(PATHDEF_SRC)
+	@echo char_u *compiled_sys = (char_u *)"$(USERDOMAIN)"; >> $(PATHDEF_SRC)
 endif
 
 # vim: set noet sw=8 ts=8 sts=0 wm=0 tw=0:
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index 54740d7..04e566b 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -1702,7 +1702,7 @@
 E_LINKARGS2 = $(E0_LINKARGS2:"=\")
 # ") stop the string
 
-$(PATHDEF_SRC): auto
+$(PATHDEF_SRC): Make_mvc.mak
 	@echo creating $(PATHDEF_SRC)
 	@echo /* pathdef.c */ > $(PATHDEF_SRC)
 	@echo #include "vim.h" >> $(PATHDEF_SRC)
@@ -1713,9 +1713,6 @@
 	@echo char_u *compiled_user = (char_u *)"$(USERNAME)"; >> $(PATHDEF_SRC)
 	@echo char_u *compiled_sys = (char_u *)"$(USERDOMAIN)"; >> $(PATHDEF_SRC)
 
-auto:
-	if not exist auto/nul mkdir auto
-
 # End Custom Build
 proto.h: \
 	proto/arabic.pro \
diff --git a/src/version.c b/src/version.c
index a7dff69..bc19c04 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1578,
+/**/
     1577,
 /**/
     1576,