diff --git a/example/support/product.nim b/example/support/product.nim
new file mode 100644
index 0000000..0ac7ec3
--- /dev/null
+++ b/example/support/product.nim
@@ -0,0 +1,18 @@
+
+{.passc: gorge("pkg-config --cflags gmp nlohmann_json").}
+{.passl: gorge("pkg-config --libs gmp nlohmann_json").}
+
+when defined(arm64):
+  {.passc: "-D_LONG_LONG_LIMB".}
+  {.compile("fr_raw_arm64.s", "-O3 -DNDEBUG -arch arm64 -fPIC -D_LONG_LONG_LIMB").}
+  {.compile: "fr_raw_generic.cpp".}
+  {.compile: "fr_generic.cpp".}
+else:
+  {.compile: "fr.asm".}
+
+{.compile: "fr.cpp".}
+{.compile: "calcwit.cpp".}
+{.compile: "witnesscalc.cpp".}
+{.compile: "circuits_incl.cpp".}
+# {.compile: "product.cpp".}
+{.compile: "main.cpp".}
diff --git a/example/support/product.nims b/example/support/product.nims
new file mode 100644
index 0000000..e86226e
--- /dev/null
+++ b/example/support/product.nims
@@ -0,0 +1,4 @@
+
+--backend:cpp
+--noMain:on
+--verbosity:2