diff --git a/patch_and_build.sh b/patch_and_build.sh
new file mode 100755
index 0000000..a7727f8
--- /dev/null
+++ b/patch_and_build.sh
@@ -0,0 +1,49 @@
+#!/bin/bash
+# Patch code for SHA256 support and rebuild
+
+if [ "$EUID" -ne 0 ]; then
+  echo "Bitte als root ausführen."
+  exit 1
+fi
+
+echo "=== Stoppe Miner ==="
+systemctl stop necrohash-miner
+
+echo "=== Bereinige alte Build-Dateien ==="
+cd /tmp
+rm -rf cgminer-gc3355
+
+echo "=== Clone dtbartle/cgminer-gc3355 ==="
+git clone https://github.com/dtbartle/cgminer-gc3355.git
+cd cgminer-gc3355
+
+echo "=== Patche driver-gridseed.c für SHA256/Scrypt Switching ==="
+
+# Patch 1: gc3355_init - nur LTC Reset senden wenn Scrypt aktiv
+sed -i 's/gc3355_send_cmds(gridseed, str_ltc_reset);/if (opt_scrypt) gc3355_send_cmds(gridseed, str_ltc_reset);/' driver-gridseed.c
+
+# Patch 2: gridseed_prepare_work - nur LTC Reset senden wenn Scrypt aktiv
+# Hier müssen wir vorsichtiger sein mit sed, da der Kontext wichtig ist.
+# Wir suchen nach der Zeile und ersetzen sie.
+sed -i 's/gc3355_send_cmds(gridseed, str_ltc_reset);/if (opt_scrypt) gc3355_send_cmds(gridseed, str_ltc_reset);/' driver-gridseed.c
+
+echo "=== Konfiguriere Build ==="
+export CFLAGS="-fcommon -O2"
+if [ -f "./autogen.sh" ]; then
+    ./autogen.sh
+else
+    autoreconf -ivf
+fi
+
+# Wir aktivieren BEIDES (SHA und Scrypt), damit das Runtime-Flag (opt_scrypt) greift
+./configure --enable-gridseed --enable-scrypt --without-curses
+
+echo "=== Kompiliere... ==="
+make -j1
+
+echo "=== Installiere ==="
+make install
+
+echo "=== Fertig ==="
+echo "Starte Miner neu..."
+systemctl start necrohash-miner