diff --git a/bin/fdroid-docker-builder.sh b/bin/fdroid-docker-builder.sh
new file mode 100755
index 0000000..256860a
--- /dev/null
+++ b/bin/fdroid-docker-builder.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+
+set -euo pipefail
+
+if [ -z "$1" ]; then
+    echo "Uso: $0 <cartella-sorgente>"
+    exit 1
+fi
+
+SOURCE_DIR="$(realpath "$1")"
+
+# https://hub.docker.com/r/fabmazza/android-build-fdroid
+IMAGE_NAME="${IMAGE_NAME:-fabmazza/android-build-fdroid:ubuntu}"
+
+# Eat the first argument.
+# So we pass all the other shit to gradle.
+shift
+
+if [ ! -d "$SOURCE_DIR" ]; then
+    echo "Errore: '$SOURCE_DIR' non è una cartella valida"
+    exit 1
+fi
+
+if [[ "$UID" = 0 ]]; then
+        echo "Do not run as root."
+        exit 2
+fi
+
+GID=$(id -g)
+
+echo "[INFO] User info: $(id)"
+echo "[INFO] UID=$UID"
+echo "[INFO] GID=$GID"
+echo "[INFO] IMAGE_NAME=$IMAGE_NAME"
+echo "[INFO] SOURCE_DIR=$SOURCE_DIR"
+
+## From this point, say what we are doing.
+set -x
+
+docker run \
+  -e DESIRED_UID="$UID" \
+  -e DESIRED_GID="$GID" \
+  --rm \
+  -v "$SOURCE_DIR":/home/vagrant/appbuild:Z \
+   "$IMAGE_NAME" \
+  launch_build_local $@