2 files changed, 6 insertions, 5 deletions
diff --git a/.gitignore b/.gitignore
index 9da71de..f4bb047 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,4 @@
 *.fs
 *.log
 *.svg
-
+*.dep
diff --git a/Makefile b/Makefile
index 5f3d026..9f38548 100644
--- a/Makefile
+++ b/Makefile
@@ -38,19 +38,19 @@ clean:
 
 synth: $(PROGRAM).json
 
-deps: $(DEPS)
+deps: $(PROGRAM).dep
 
 ## Patterns
 
 # synthesize
-# re-synth if deps change (and create in the first place)
-%.json: %.v %.dep
+%.json: %.v
+	gawk 'match($$0, /`include "(.*)"/, ary) {print "$*.json:", ary[1]}'  $< > $*.dep
 	yosys -p "read_verilog $<; synth_gowin -top $* -json $@" $(YOSYS_OPTS) 
 
 # because yosys -E is buggy, or behaves differently than expected,
 # use gawk to force-create deps.
 %.dep: %.v
-	gawk 'match($$0, /`include "(.*)"/, ary) {print FILENAME, ":", ary[1]}'  $< > $@
+	gawk 'match($$0, /`include "(.*)"/, ary) {print "$*.json:", ary[1]}'  $< > $@
 
 # place and route?
 %.pnr.json: %.json $(CST)
@@ -74,3 +74,4 @@ deps: $(DEPS)
 
 ## inter-file dependencies
 -include $(DEPS)
+-include $($(wildcard *.fs:.fs=.dep)