diff --git a/extras/win32-portable/create_portable.txt b/extras/win32-portable/create_portable.txt
index 6213aafd6..5c5fa2c41 100644
--- a/extras/win32-portable/create_portable.txt
+++ b/extras/win32-portable/create_portable.txt
@@ -6,17 +6,11 @@ How to create a new portable Windows distribution of OpenSlides:
 
       easy_install -Z django django-mptt reportlab pil
 
-2.) Install OpenSlides by running in the top directory:
-
-        python setup.py install
-
-    NOTE: This step must be repeated whenever you make changes to OpenSlides.
-
-3.) Run in the main directory of the OpenSlides checkout:
+2.) Run in the main directory of the OpenSlides checkout:
 
       python extras\win32-portable\prepare_portable.py
 
-4.) The portable OpenSlides distribution is now ready as a zip archive 
+3.) The portable OpenSlides distribution is now ready as a zip archive 
     in the 'dist' directory
 
 
diff --git a/extras/win32-portable/prepare_portable.py b/extras/win32-portable/prepare_portable.py
index 04c1e0cc7..9418b8e10 100644
--- a/extras/win32-portable/prepare_portable.py
+++ b/extras/win32-portable/prepare_portable.py
@@ -18,8 +18,6 @@ import zipfile
 import distutils.ccompiler
 import distutils.sysconfig
 
-from contextlib import nested
-
 import pkg_resources
 
 sys.path.insert(0, os.getcwd())
@@ -80,10 +78,7 @@ SITE_PACKAGES = {
     "pil": {
         # NOTE: PIL is a special case, see copy_pil
         "copy": [],
-    },
-    "openslides": {
-        "copy" : ["openslides"],
-    },
+    }
 }
 
 PY_DLLS = [
@@ -297,9 +292,13 @@ def main():
             raise
 
     os.makedirs(odir)
+    out_site_packages = os.path.join(odir, "site-packages")
 
     collect_lib(libdir, odir)
-    collect_site_packages(sitedir, os.path.join(odir, "site-packages"))
+    collect_site_packages(sitedir, out_site_packages)
+
+    exclude = get_pkg_exclude("openslides")
+    copy_dir_exclude(exclude, ".", "openslides", out_site_packages)
 
     if not compile_openslides_launcher():
         sys.stdout.write("Using prebuild openslides.exe\n")