diff --git a/.gitignore b/.gitignore
index 4344728..7140184 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,15 +56,5 @@ boot-scripts/boot.net
 
 doc/**/*.pdf
 
-CMakeLists.txt.user
-CMakeCache.txt
-CMakeFiles
-CMakeScripts
-Testing
-Makefile
-cmake_install.cmake
-install_manifest.txt
-compile_commands.json
-CTestTestfile.cmake
-_deps
-CMakeUserPresets.json
+build
+src/03-led-controller/led-controller
diff --git a/src/03-led-controller/CMakeLists.txt b/src/03-led-controller/CMakeLists.txt
deleted file mode 100644
index 62abb23..0000000
--- a/src/03-led-controller/CMakeLists.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-cmake_minimum_required(VERSION 3.28)
-project(led-controller)
-
-include(../nanopi.cmake)
-add_executable(led-controller main.c)
diff --git a/src/03-led-controller/Makefile b/src/03-led-controller/Makefile
new file mode 100644
index 0000000..d9d45cb
--- /dev/null
+++ b/src/03-led-controller/Makefile
@@ -0,0 +1,5 @@
+EXE=led-controller
+SRCS=$(wildcard *.c)
+
+# Include the standard application Makefile for the CSEL1 labs
+include ../appl.mk
diff --git a/src/03-led-controller/justfile b/src/03-led-controller/justfile
index b965e1c..1e9dacb 100644
--- a/src/03-led-controller/justfile
+++ b/src/03-led-controller/justfile
@@ -1,5 +1,7 @@
 build:
-    cmake -S . -B build && cmake --build build
+    make
 
 clean:
     rm -rf build
+    rm -rf .obj
+    rm led-controller