diff --git a/.github/workflows/src/makefile b/.github/workflows/src/makefile
index 2f47642..4e8116d 100644
--- a/.github/workflows/src/makefile
+++ b/.github/workflows/src/makefile
@@ -1,7 +1,9 @@
 # Copyright 2021 Manna Harbour
 # https://github.com/manna-harbour/miryoku
 
-all: ../build-example-corne-nice_nano.yml ../build-example-tbkmini-nice_nano_v2.yml ../build-inputs.yml ../test-boards.yml ../test-build.yml ../test-configs.yml ../test-controllers.yml ../test-shields.yml
+source := $(wildcard *.yml.m4)
+targets := $(source:%.yml.m4=../%.yml)
+all: $(targets)
 
 ../%.yml: %.yml.m4 include/* makefile
 	m4 -P include/init.yml.m4 $< > $@