diff --git a/tools/build/autobuild.py b/tools/build/autobuild.py
new file mode 100644
index 0000000..bf9703a
--- /dev/null
+++ b/tools/build/autobuild.py
@@ -0,0 +1,106 @@
+#!/usr/bin/python
+#
+# Autobuild script for RetroBSD
+#
+import sys, string, os, subprocess, shutil, datetime, MySQLdb
+
+BSD     = "/website/retrobsd/build/retrobsd-sources"
+ARCHIVE = "/website/retrobsd/build/master"
+REPO    = "https://github.com/RetroBSD/retrobsd.git"
+
+#
+# Get current date
+#
+today = datetime.date.today()
+DATE = "%04d-%02d-%02d" % (today.year, today.month, today.day)
+print "--- Date:", DATE
+
+#
+# (1) If BSD directory exists: use 'git pull' to update
+#     otherwise: check it out
+#
+if os.path.exists(BSD):
+    print "--- Update the existing source tree"
+    os.system("git -C "+BSD+" pull")
+    fresh_sources = False
+else:
+    print "--- Checkout a fresh snapshot of sources"
+    os.system("git clone "+REPO+" "+BSD)
+    fresh_sources = True
+
+#
+# (2) Get the revision number REV
+#
+rev = subprocess.check_output(string.split("git -C "+BSD+" rev-list HEAD --count"))
+rev = int(rev)
+print "--- Latest revision:", rev
+
+#
+# (3) If the REV already exists in the ARCHIVE: all done.
+#     Otherwise proceed to (4).
+#
+if os.path.exists(ARCHIVE + "/" + str(rev)):
+    print "--- Build for revision "+str(rev)+" already exists"
+    print "--- Finished"
+    sys.exit (0)
+
+#
+# (4) If the source tree is not fresh from (1), delete it
+#     and checkout a new one.
+#
+if not fresh_sources:
+    print "--- Checkout a fresh snapshot of sources"
+    shutil.rmtree(BSD)
+    os.system("git clone "+REPO+" "+BSD)
+
+#
+# (5) Pack the source tree into the zip archive.
+#
+print "--- Pack sources into sources-"+DATE+".zip"
+os.mkdir(ARCHIVE + "/" + str(rev))
+os.system("cd "+BSD+"/.. && zip -rq "+ARCHIVE+"/"+str(rev)+"/sources-"+DATE+".zip retrobsd-sources -x .git \\*/.gitignore")
+
+#
+# (6) Build everything in BSD/tools/build directory.
+#
+print "--- Build everything"
+os.system("make -C "+BSD+"/tools/build all")
+
+#
+# (7) Move log and zip files into ARCHIVE.
+#
+print "--- Move log and zip files"
+os.system("mv "+BSD+"/tools/build/*.log "+ARCHIVE+"/"+str(rev))
+os.system("mv "+BSD+"/tools/build/*.zip "+ARCHIVE+"/"+str(rev))
+
+#
+# (8) Query mysql db for the total count of downloads
+#     for the previous revision.
+#
+# (9) If no downloads, delete the previous revision.
+#
+mysql = MySQLdb.connect (user = "autobuild",
+                           db = "autobuild",
+                       passwd = "retr0bsd")
+for r in range(rev-1, 0, -1):
+    # Skip non-existing revisions
+    dir = ARCHIVE + "/" + str(r)
+    if not os.path.exists(dir):
+        continue
+
+    # Get download count for this revision
+    cur = mysql.cursor()
+    cur.execute ("""
+        SELECT count(*)
+          FROM downloads
+         WHERE branch = 'master'
+           AND build = %d
+        """ % r)
+    count = cur.fetchall()[0][0]
+    if count > 0:
+        break
+
+    print "--- Delete unused revision", r
+    shutil.rmtree(dir)
+
+sys.exit (0)