diff --git a/build.ninja b/build.ninja
new file mode 100644
index 0000000..39545d6
--- /dev/null
+++ b/build.ninja
@@ -0,0 +1,6 @@
+rule ergogen
+  command = ergogen $infolder -o $outfolder
+
+build pcb/pcbs/keyboard.kicad_pcb: ergogen
+  infolder = ./ergogen
+  outfolder = ./pcb