diff --git a/bluezip.py b/bluezip.py
index 631d555..bc43c04 100755
--- a/bluezip.py
+++ b/bluezip.py
@@ -9,10 +9,10 @@
 import getpass
 import zipfile
 import fnmatch
-import shutil
 import socket
 import json
 import time
+import shutil
 import sys
 import stat
 import re
@@ -195,10 +195,10 @@ def process_game(self, game):
         c.execute('SELECT revision, sha256, title FROM game WHERE id = ? ORDER BY revision DESC LIMIT 1', (game.uid,))
         revision, prev_sha256, prev_title = c.fetchone() or (1, None, None)
         os.mkdir(build_dir)
-        shutil.move(game.content_path, os.path.join(build_dir, 'content'))
+        util.shutil_move(game.content_path, os.path.join(build_dir, 'content'), rmtree_onerror=remove_readonly)
         sha256 = create_torrentzip(game.uid, game.platform, build_dir, dist)
         outfile = os.path.join(DIST_DIR, f'{game.uid}.zip')
-        shutil.move(dist, outfile)
+        util.shutil_move(dist, outfile, rmtree_onerror=remove_readonly)
         if prev_sha256:
             if prev_sha256 == sha256:
                 pcolor('green', 'no change')
diff --git a/util.py b/util.py
index 8d80bf4..7e68121 100644
--- a/util.py
+++ b/util.py
@@ -2,6 +2,9 @@
 import zlib
 import re
 import os
+import sys
+import shutil
+import stat
 
 def open_db():
     try:
@@ -87,3 +90,122 @@ def pcolor_off(color, *args, **kwargs):
 def no_color():
     global pcolor
     pcolor = pcolor_off
+
+def shutil_move(src, dst, copy_function=shutil.copy2, rmtree_onerror=None):
+    """Recursively move a file or directory to another location. This is
+    similar to the Unix "mv" command. Return the file or directory's
+    destination.
+
+    If the destination is a directory or a symlink to a directory, the source
+    is moved inside the directory. The destination path must not already
+    exist.
+
+    If the destination already exists but is not a directory, it may be
+    overwritten depending on os.rename() semantics.
+
+    If the destination is on our current filesystem, then rename() is used.
+    Otherwise, src is copied to the destination and then removed. Symlinks are
+    recreated under the new name if os.rename() fails because of cross
+    filesystem renames.
+
+    The optional `copy_function` argument is a callable that will be used
+    to copy the source or it will be delegated to `copytree`.
+    By default, copy2() is used, but any function that supports the same
+    signature (like copy()) can be used.
+
+    The optional `rmtree_onerror` argument is a callable that will be used
+    as the "onerror" argument to rmtree(), if it gets called.
+
+    A lot more could be done here...  A look at a mv.c shows a lot of
+    the issues this implementation glosses over.
+
+    """
+    sys.audit("shutil.move", src, dst)
+    real_dst = dst
+    if os.path.isdir(dst):
+        if _samefile(src, dst):
+            # We might be on a case insensitive filesystem,
+            # perform the rename anyway.
+            os.rename(src, dst)
+            return
+
+        # Using _basename instead of os.path.basename is important, as we must
+        # ignore any trailing slash to avoid the basename returning ''
+        real_dst = os.path.join(dst, _basename(src))
+
+        if os.path.exists(real_dst):
+            raise Error("Destination path '%s' already exists" % real_dst)
+    try:
+        os.rename(src, real_dst)
+    except OSError:
+        if os.path.islink(src):
+            linkto = os.readlink(src)
+            os.symlink(linkto, real_dst)
+            os.unlink(src)
+        elif os.path.isdir(src):
+            if _destinsrc(src, dst):
+                raise Error("Cannot move a directory '%s' into itself"
+                            " '%s'." % (src, dst))
+            if (_is_immutable(src)
+                    or (not os.access(src, os.W_OK) and os.listdir(src)
+                        and sys.platform == 'darwin')):
+                raise PermissionError("Cannot move the non-empty directory "
+                                      "'%s': Lacking write permission to '%s'."
+                                      % (src, src))
+            shutil.copytree(src, real_dst, copy_function=copy_function,
+                            symlinks=True)
+            shutil.rmtree(src, onerror=rmtree_onerror)
+        else:
+            copy_function(src, real_dst)
+            os.unlink(src)
+    return real_dst
+
+def _samefile(src, dst):
+    # Macintosh, Unix.
+    if isinstance(src, os.DirEntry) and hasattr(os.path, 'samestat'):
+        try:
+            return os.path.samestat(src.stat(), os.stat(dst))
+        except OSError:
+            return False
+
+    if hasattr(os.path, 'samefile'):
+        try:
+            return os.path.samefile(src, dst)
+        except OSError:
+            return False
+
+    # All other platforms: check for same pathname.
+    return (os.path.normcase(os.path.abspath(src)) ==
+            os.path.normcase(os.path.abspath(dst)))
+
+def _is_immutable(src):
+    st = _stat(src)
+    immutable_states = [stat.UF_IMMUTABLE, stat.SF_IMMUTABLE]
+    return hasattr(st, 'st_flags') and st.st_flags in immutable_states
+
+def _basename(path):
+    """A basename() variant which first strips the trailing slash, if present.
+    Thus we always get the last component of the path, even for directories.
+
+    path: Union[PathLike, str]
+
+    e.g.
+    >>> os.path.basename('/bar/foo')
+    'foo'
+    >>> os.path.basename('/bar/foo/')
+    ''
+    >>> _basename('/bar/foo/')
+    'foo'
+    """
+    path = os.fspath(path)
+    sep = os.path.sep + (os.path.altsep or '')
+    return os.path.basename(path.rstrip(sep))
+
+def _destinsrc(src, dst):
+    src = os.path.abspath(src)
+    dst = os.path.abspath(dst)
+    if not src.endswith(os.path.sep):
+        src += os.path.sep
+    if not dst.endswith(os.path.sep):
+        dst += os.path.sep
+    return dst.startswith(src)