diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8626019
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/work.d
diff --git a/build.sh b/build.sh
index d0f6a0b..0b6ac97 100644
--- a/build.sh
+++ b/build.sh
@@ -1,5 +1,22 @@
 #! /bin/bash
 
-date
+main() {
+   set -euo pipefail
 
-exit 0
+   d="$PWD"
+   mkdir -p ./work.d
+   cd ./work.d
+   cleanup() {
+      cd "$d"
+      rm -rf ./work.d || true
+   }
+   trap cleanup EXIT
+
+   git clone \
+      https://github.com/fe80Grau/ytdlp2STRM.git \
+      --depth=1
+}
+
+if [ "$0" == "$BASH_SOURCE" ]; then
+   main "$@"
+fi