diff --git a/Makefile b/Makefile
index 1317654..20c28f9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,4 @@
-#  TARGETS=$(shell sed '/^module [a-z0-9_-]*().*make..\?me.*$$/!d;s/module //;s/().*/.stl/' main.scad)
-
-
+TARGETS=$(shell python3 get_targets.py main.json)
 
 GENERATED_FILES = 	$(wildcard *.deps) \
 					$(wildcard *.stl) \
@@ -9,14 +7,14 @@ GENERATED_FILES = 	$(wildcard *.deps) \
 
 .phony: all clean
 
-# all: ${TARGETS}
+all: ${TARGETS}
 
 include $(wildcard *.deps)
 
 %.stl: main.scad main.json Makefile
 		flatpak run org.openscad.OpenSCAD --enable textmetrics -p main.json -P $(basename $@) -DFN=64 -D "MODELVER=\"$(shell git rev-parse --short=6 HEAD)\"" -m make -o $@ -d $@.deps $<
 
-%.png:
+%.png: main.scad main.json Makefile
 	flatpak run org.openscad.OpenSCAD --enable textmetrics -p main.json -P $(basename $@) -DFN=32 --render --imgsize 1600,1200 -o $@ main.scad
 
 clean:
diff --git a/get_targets.py b/get_targets.py
new file mode 100644
index 0000000..3474616
--- /dev/null
+++ b/get_targets.py
@@ -0,0 +1,9 @@
+import json
+import sys
+
+with open(sys.argv[1]) as f:
+    d = json.load(f)
+    sets=[]
+    for set in d['parameterSets']:
+        sets.append(set + '.stl')
+    print(' '.join(sets))