yuvconvert.c is a part of the "sv" module, an old IRIX thing
and certainly not useful for any Windows build.
diff --git a/PC/os2vacpp/makefile b/PC/os2vacpp/makefile
index f34047f..c75bec3 100644
--- a/PC/os2vacpp/makefile
+++ b/PC/os2vacpp/makefile
@@ -203,8 +203,7 @@
                   $(PATHOBJ)\StropModule.obj   \
                   $(PATHOBJ)\StructModule.obj  \
                   $(PATHOBJ)\TimeModule.obj    \
-                  $(PATHOBJ)\ThreadModule.obj  \
-                  $(PATHOBJ)\YUVConvert.obj
+                  $(PATHOBJ)\ThreadModule.obj
 
 # Standalone Parser Generator Program (Shares Some of Python's Modules)
 PGEN            =                              \
@@ -1113,8 +1112,7 @@
 	 $(PY_INCLUDE)\pyerrors.h $(PY_INCLUDE)\pyfpe.h $(PY_INCLUDE)\pystate.h \
 	 $(PY_INCLUDE)\python.h $(PY_INCLUDE)\pythonrun.h $(PY_INCLUDE)\rangeobject.h \
 	 $(PY_INCLUDE)\sliceobject.h $(PY_INCLUDE)\stringobject.h \
-	 $(PY_INCLUDE)\sysmodule.h $(PY_INCLUDE)\traceback.h $(PY_INCLUDE)\tupleobject.h \
-	 $(PY_MODULES)\yuv.h
+	 $(PY_INCLUDE)\sysmodule.h $(PY_INCLUDE)\traceback.h $(PY_INCLUDE)\tupleobject.h
 
 syslogmodule.obj: $(PY_INCLUDE)\abstract.h $(PY_INCLUDE)\ceval.h \
 	 $(PY_INCLUDE)\classobject.h $(PY_INCLUDE)\cobject.h $(PY_INCLUDE)\complexobject.h \
@@ -1198,8 +1196,6 @@
 	 $(PY_INCLUDE)\sliceobject.h $(PY_INCLUDE)\stringobject.h \
 	 $(PY_INCLUDE)\sysmodule.h $(PY_INCLUDE)\traceback.h $(PY_INCLUDE)\tupleobject.h
 
-yuvconvert.obj: $(PY_MODULES)\yuv.h
-
 zlibmodule.obj: $(PY_INCLUDE)\abstract.h $(PY_INCLUDE)\ceval.h $(PY_INCLUDE)\classobject.h \
 	 $(PY_INCLUDE)\cobject.h $(PY_INCLUDE)\complexobject.h pyconfig.h \
 	 $(PY_INCLUDE)\dictobject.h $(PY_INCLUDE)\fileobject.h $(PY_INCLUDE)\floatobject.h \