diff --git a/lib/ip/xfft_16k_16b/Makefile.inc b/lib/ip/xfft_16k_16b/Makefile.inc
index 1cc6b5d..f97e84b 100644
--- a/lib/ip/xfft_16k_16b/Makefile.inc
+++ b/lib/ip/xfft_16k_16b/Makefile.inc
@@ -13,5 +13,9 @@ xfft_16k_16b.xci.out \
 synth/xfft_16k_16b.vhd \
 )
 
-$(LIB_IP_XFFT_16K_16B_SRCS) $(LIB_IP_XFFT_16K_16B_OUTS) : $(LIB_IP_DIR)/xfft_16k_16b/xfft_16k_16b.xci
+.INTERMEDIATE: LIB_IP_XFFT_16K_16B_TRGT
+$(LIB_IP_XFFT_16K_16B_SRCS) $(LIB_IP_XFFT_16K_16B_OUTS): LIB_IP_XFFT_16K_16B_TRGT
+	@:
+
+LIB_IP_XFFT_16K_16B_TRGT : $(LIB_IP_DIR)/xfft_16k_16b/xfft_16k_16b.xci
 	$(call BUILD_VIVADO_IP,xfft_16k_16b,$(ARCH),$(PART_ID),$(LIB_IP_DIR),$(IP_BUILD_DIR),0)
diff --git a/lib/ip/xfft_1k_16b/Makefile.inc b/lib/ip/xfft_1k_16b/Makefile.inc
index 509901f..7655f14 100644
--- a/lib/ip/xfft_1k_16b/Makefile.inc
+++ b/lib/ip/xfft_1k_16b/Makefile.inc
@@ -13,5 +13,9 @@ xfft_1k_16b.xci.out \
 synth/xfft_1k_16b.vhd \
 )
 
-$(LIB_IP_XFFT_1K_16B_SRCS) $(LIB_IP_XFFT_1K_16B_OUTS) : $(LIB_IP_DIR)/xfft_1k_16b/xfft_1k_16b.xci
+.INTERMEDIATE: LIB_IP_XFFT_1K_16B_TRGT
+$(LIB_IP_XFFT_1K_16B_SRCS) $(LIB_IP_XFFT_1K_16B_OUTS): LIB_IP_XFFT_1K_16B_TRGT
+	@:
+
+LIB_IP_XFFT_1K_16B_TRGT : $(LIB_IP_DIR)/xfft_1k_16b/xfft_1k_16b.xci
 	$(call BUILD_VIVADO_IP,xfft_1k_16b,$(ARCH),$(PART_ID),$(LIB_IP_DIR),$(IP_BUILD_DIR),0)
diff --git a/lib/ip/xfft_2k_16b/Makefile.inc b/lib/ip/xfft_2k_16b/Makefile.inc
index baa90b6..fe7fbe3 100644
--- a/lib/ip/xfft_2k_16b/Makefile.inc
+++ b/lib/ip/xfft_2k_16b/Makefile.inc
@@ -13,5 +13,9 @@ xfft_2k_16b.xci.out \
 synth/xfft_2k_16b.vhd \
 )
 
-$(LIB_IP_XFFT_2K_16B_SRCS) $(LIB_IP_XFFT_2K_16B_OUTS) : $(LIB_IP_DIR)/xfft_2k_16b/xfft_2k_16b.xci
+.INTERMEDIATE: LIB_IP_XFFT_2K_16B_TRGT
+$(LIB_IP_XFFT_2K_16B_SRCS) $(LIB_IP_XFFT_2K_16B_OUTS): LIB_IP_XFFT_2K_16B_TRGT
+	@:
+
+LIB_IP_XFFT_2K_16B_TRGT : $(LIB_IP_DIR)/xfft_2k_16b/xfft_2k_16b.xci
 	$(call BUILD_VIVADO_IP,xfft_2k_16b,$(ARCH),$(PART_ID),$(LIB_IP_DIR),$(IP_BUILD_DIR),0)
diff --git a/lib/ip/xfft_32k_16b/Makefile.inc b/lib/ip/xfft_32k_16b/Makefile.inc
index 2748499..ce2bb0e 100644
--- a/lib/ip/xfft_32k_16b/Makefile.inc
+++ b/lib/ip/xfft_32k_16b/Makefile.inc
@@ -13,5 +13,9 @@ xfft_32k_16b.xci.out \
 synth/xfft_32k_16b.vhd \
 )
 
-$(LIB_IP_XFFT_32K_16B_SRCS) $(LIB_IP_XFFT_32K_16B_OUTS) : $(LIB_IP_DIR)/xfft_32k_16b/xfft_32k_16b.xci
+.INTERMEDIATE: LIB_IP_XFFT_32K_16B_TRGT
+$(LIB_IP_XFFT_32K_16B_SRCS) $(LIB_IP_XFFT_32K_16B_OUTS): LIB_IP_XFFT_32K_16B_TRGT
+	@:
+
+LIB_IP_XFFT_32K_16B_TRGT : $(LIB_IP_DIR)/xfft_32k_16b/xfft_32k_16b.xci
 	$(call BUILD_VIVADO_IP,xfft_32k_16b,$(ARCH),$(PART_ID),$(LIB_IP_DIR),$(IP_BUILD_DIR),0)
diff --git a/lib/ip/xfft_4k_16b/Makefile.inc b/lib/ip/xfft_4k_16b/Makefile.inc
index fd8cd31..028182e 100644
--- a/lib/ip/xfft_4k_16b/Makefile.inc
+++ b/lib/ip/xfft_4k_16b/Makefile.inc
@@ -13,5 +13,9 @@ xfft_4k_16b.xci.out \
 synth/xfft_4k_16b.vhd \
 )
 
-$(LIB_IP_XFFT_4K_16B_SRCS) $(LIB_IP_XFFT_4K_16B_OUTS) : $(LIB_IP_DIR)/xfft_4k_16b/xfft_4k_16b.xci
+.INTERMEDIATE: LIB_IP_XFFT_4K_16B_TRGT
+$(LIB_IP_XFFT_4K_16B_SRCS) $(LIB_IP_XFFT_4K_16B_OUTS): LIB_IP_XFFT_4K_16B_TRGT
+	@:
+
+LIB_IP_XFFT_4K_16B_TRGT : $(LIB_IP_DIR)/xfft_4k_16b/xfft_4k_16b.xci
 	$(call BUILD_VIVADO_IP,xfft_4k_16b,$(ARCH),$(PART_ID),$(LIB_IP_DIR),$(IP_BUILD_DIR),0)
diff --git a/lib/ip/xfft_64k_16b/Makefile.inc b/lib/ip/xfft_64k_16b/Makefile.inc
index 6af24c3..1178e80 100644
--- a/lib/ip/xfft_64k_16b/Makefile.inc
+++ b/lib/ip/xfft_64k_16b/Makefile.inc
@@ -13,5 +13,9 @@ xfft_64k_16b.xci.out \
 synth/xfft_64k_16b.vhd \
 )
 
-$(LIB_IP_XFFT_64K_16B_SRCS) $(LIB_IP_XFFT_64K_16B_OUTS) : $(LIB_IP_DIR)/xfft_64k_16b/xfft_64k_16b.xci
+.INTERMEDIATE: LIB_IP_XFFT_64K_16B_TRGT
+$(LIB_IP_XFFT_64K_16B_SRCS) $(LIB_IP_XFFT_64K_16B_OUTS): LIB_IP_XFFT_64K_16B_TRGT
+	@:
+
+LIB_IP_XFFT_64K_16B_TRGT : $(LIB_IP_DIR)/xfft_64k_16b/xfft_64k_16b.xci
 	$(call BUILD_VIVADO_IP,xfft_64k_16b,$(ARCH),$(PART_ID),$(LIB_IP_DIR),$(IP_BUILD_DIR),0)
diff --git a/lib/ip/xfft_8k_16b/Makefile.inc b/lib/ip/xfft_8k_16b/Makefile.inc
index 5e30db5..bca381d 100644
--- a/lib/ip/xfft_8k_16b/Makefile.inc
+++ b/lib/ip/xfft_8k_16b/Makefile.inc
@@ -13,5 +13,9 @@ xfft_8k_16b.xci.out \
 synth/xfft_8k_16b.vhd \
 )
 
-$(LIB_IP_XFFT_8K_16B_SRCS) $(LIB_IP_XFFT_8K_16B_OUTS) : $(LIB_IP_DIR)/xfft_8k_16b/xfft_8k_16b.xci
+.INTERMEDIATE: LIB_IP_XFFT_8K_16B_TRGT
+$(LIB_IP_XFFT_8K_16B_SRCS) $(LIB_IP_XFFT_8K_16B_OUTS): LIB_IP_XFFT_8K_16B_TRGT
+	@:
+
+LIB_IP_XFFT_8K_16B_TRGT : $(LIB_IP_DIR)/xfft_8k_16b/xfft_8k_16b.xci
 	$(call BUILD_VIVADO_IP,xfft_8k_16b,$(ARCH),$(PART_ID),$(LIB_IP_DIR),$(IP_BUILD_DIR),0)