diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ddca6aa0f..541281c33 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -59,6 +59,9 @@ jobs:
       - name: Install dependencies
         run: ./scripts/deps.sh
 
+      - name: Show config
+        run: make BOARD=${{ matrix.boards }} show-config
+
       - name: Build firmware
         run: make BOARD=${{ matrix.boards }} VERBOSE=1
 
diff --git a/Makefile b/Makefile
index d414d4a2a..e519c55c8 100644
--- a/Makefile
+++ b/Makefile
@@ -61,6 +61,13 @@ SRC += $(foreach src, $(arch-y), $(ARCH_DIR)/$(src))
 
 include $(ARCH_DIR)/toolchain.mk
 
+# TODO: Generate config file as part of build.
+.PHONY: show-config
+show-config:
+	$(foreach v, \
+		$(sort $(filter CONFIG_%,$(.VARIABLES))), \
+		$(info $(v)=$($(v))))
+
 # The architecture defines build targets, no more is required
 endif