--- gfx/ycbcr/Makefile.in
+++ gfx/ycbcr/Makefile.in
@@ -54,23 +54,13 @@ CPPSRCS += yuv_row_win.cpp \
            $(NULL)
 endif
 else
-ifeq ($(OS_ARCH),Linux)
-CPPSRCS += yuv_row_posix.cpp \
-           $(NULL)
-else
-ifeq ($(OS_ARCH),SunOS)
-CPPSRCS += yuv_row_posix.cpp \
-           $(NULL)
-else
-ifeq ($(OS_ARCH),Darwin)
+ifneq (,$(filter Linux SunOS Darwin DragonFly FreeBSD NetBSD OpenBSD, $(OS_ARCH)))
 CPPSRCS += yuv_row_posix.cpp \
            $(NULL)
 else
 CPPSRCS += yuv_row_other.cpp \
            $(NULL)
-endif # Darwin
-endif # SunOS
-endif # linux
+endif # posix
 endif # windows
 
 ifeq (arm,$(findstring arm,$(OS_TEST)))