diff --git a/contrib/build-wine/build-electrum-git.sh b/contrib/build-wine/build-electrum-git.sh
index 5979ed782..a0160f0de 100755
--- a/contrib/build-wine/build-electrum-git.sh
+++ b/contrib/build-wine/build-electrum-git.sh
@@ -10,6 +10,7 @@ fi
 # These settings probably don't need any change
 export WINEPREFIX=/opt/wine64
 export PYTHONDONTWRITEBYTECODE=1
+export PYTHONHASHSEED=22
 
 PYHOME=c:/python$PYTHON_VERSION
 PYTHON="wine $PYHOME/python.exe -OO -B"
@@ -64,7 +65,7 @@ cd ..
 rm -rf dist/
 
 # build standalone version
-wine "C:/python$PYTHON_VERSION/scripts/pyinstaller.exe" --noconfirm --ascii --name $NAME_ROOT-$VERSION.exe -w deterministic.spec 
+wine "C:/python$PYTHON_VERSION/scripts/pyinstaller.exe" --noconfirm --ascii --name $NAME_ROOT-$VERSION -w deterministic.spec
 
 # build NSIS installer
 # $VERSION could be passed to the electrum.nsi script, but this would require some rewriting in the script iself.
@@ -74,11 +75,4 @@ cd dist
 mv electrum-setup.exe $NAME_ROOT-$VERSION-setup.exe
 cd ..
 
-# build portable version
-cp portable.patch $WINEPREFIX/drive_c/electrum
-pushd $WINEPREFIX/drive_c/electrum
-patch < portable.patch 
-popd
-wine "C:/python$PYTHON_VERSION/scripts/pyinstaller.exe" --noconfirm --ascii --name $NAME_ROOT-$VERSION-portable.exe -w deterministic.spec
-
 echo "Done."
diff --git a/contrib/build-wine/deterministic.spec b/contrib/build-wine/deterministic.spec
index ac002480b..bbd6c210e 100644
--- a/contrib/build-wine/deterministic.spec
+++ b/contrib/build-wine/deterministic.spec
@@ -26,7 +26,6 @@ datas = [
     (home+'lib/wordlist/english.txt', 'electrum/wordlist'),
     (home+'lib/locale', 'electrum/locale'),
     (home+'plugins', 'electrum_plugins'),
-    #(home+'packages/requests/cacert.pem', 'requests/cacert.pem')
 ]
 datas += collect_data_files('trezorlib')
 datas += collect_data_files('btchip')
@@ -70,44 +69,54 @@ pyz = PYZ(a.pure)
 
 #####
 # "standalone" exe with all dependencies packed into it
-# (or "portable", depending on cmdline_name)
 
 exe_standalone = EXE(
-          pyz,
-          a.scripts,
-          a.binaries,
-          a.datas,
-          name=os.path.join('build\\pyi.win32\\electrum', cmdline_name),
-          debug=False,
-          strip=None,
-          upx=False,
-          icon=home+'icons/electrum.ico',
-          console=False)
-          # The console True makes an annoying black box pop up, but it does make Electrum output command line commands, with this turned off no output will be given but commands can still be used
+    pyz,
+    a.scripts,
+    a.binaries,
+    a.datas, 
+    name=os.path.join('build\\pyi.win32\\electrum', cmdline_name + ".exe"),
+    debug=False,
+    strip=None,
+    upx=False,
+    icon=home+'icons/electrum.ico',
+    console=False)
+    # console=True makes an annoying black box pop up, but it does make Electrum output command line commands, with this turned off no output will be given but commands can still be used
+
+exe_portable = EXE(
+    pyz,
+    a.scripts,
+    a.binaries,
+    a.datas + [ ('is_portable', 'README.md', 'DATA' ) ],
+    name=os.path.join('build\\pyi.win32\\electrum', cmdline_name + "-portable.exe"),
+    debug=False,
+    strip=None,
+    upx=False,
+    icon=home+'icons/electrum.ico',
+    console=False)
 
 #####
 # exe and separate files that NSIS uses to build installer "setup" exe
-# FIXME: this is redundantly done again, when building the "portable" exe
 
 exe_dependent = EXE(
-          pyz,
-          a.scripts,
-          exclude_binaries=True,
-          name=os.path.join('build\\pyi.win32\\electrum', cmdline_name),
-          debug=False,
-          strip=None,
-          upx=False,
-          icon=home+'icons/electrum.ico',
-          console=False)
+    pyz,
+    a.scripts,
+    exclude_binaries=True,
+    name=os.path.join('build\\pyi.win32\\electrum', cmdline_name),
+    debug=False,
+    strip=None,
+    upx=False,
+    icon=home+'icons/electrum.ico',
+    console=False)
 
 coll = COLLECT(
-               exe_dependent,
-               a.binaries,
-               a.zipfiles,
-               a.datas,
-               strip=None,
-               upx=True,
-               debug=False,
-               icon=home+'icons/electrum.ico',
-               console=False,
-               name=os.path.join('dist', 'electrum'))
+    exe_dependent,
+    a.binaries,
+    a.zipfiles,
+    a.datas,
+    strip=None,
+    upx=True,
+    debug=False,
+    icon=home+'icons/electrum.ico',
+    console=False,
+    name=os.path.join('dist', 'electrum'))
diff --git a/contrib/build-wine/portable.patch b/contrib/build-wine/portable.patch
deleted file mode 100644
index e8f96b5b0..000000000
--- a/contrib/build-wine/portable.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/electrum b/electrum
-index 8c972c6..46903b7 100755
---- a/electrum
-+++ b/electrum
-@@ -454,6 +454,8 @@ if __name__ == '__main__':
-         if config_options.get('server'):
-             config_options['auto_connect'] = False
- 
-+    config_options['portable'] = True
-+
-     if config_options.get('portable'):
-         config_options['electrum_path'] = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'electrum_data')
- 
diff --git a/electrum b/electrum
index 17acb309b..d51aff977 100755
--- a/electrum
+++ b/electrum
@@ -316,7 +316,7 @@ if __name__ == '__main__':
         elif arg == '?':
             sys.argv[i] = input("Enter argument:")
         elif arg == ':':
-            sys.argv[i] = prompt_password('Enter argument (will noot echo):', False)
+            sys.argv[i] = prompt_password('Enter argument (will not echo):', False)
 
     # parse command line
     parser = get_parser()
@@ -338,6 +338,10 @@ if __name__ == '__main__':
 
     config_options['cwd'] = os.getcwd()
 
+    # fixme: this can probably be achieved with a runtime hook (pyinstaller)
+    if is_bundle and os.path.exists(os.path.join(sys._MEIPASS, 'is_portable')):
+        config_options.get('portable') = True
+
     if config_options.get('portable'):
         config_options['electrum_path'] = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'electrum_data')