diff --git a/contrib/build-wine/build-electrum-git.sh b/contrib/build-wine/build-electrum-git.sh
index 4b69669c4..6976c5a0e 100755
--- a/contrib/build-wine/build-electrum-git.sh
+++ b/contrib/build-wine/build-electrum-git.sh
@@ -56,7 +56,7 @@ rm -rf dist/
 
 # build standalone and portable versions
 info "Running pyinstaller..."
-wine "$WINE_PYHOME/scripts/pyinstaller.exe" --noconfirm --ascii --clean --name $NAME_ROOT-$VERSION -w deterministic.spec
+ELECTRUM_CMDLINE_NAME="$NAME_ROOT-$VERSION" wine "$WINE_PYHOME/scripts/pyinstaller.exe" --noconfirm --ascii --clean -w deterministic.spec
 
 # set timestamps in dist, in order to make the installer reproducible
 pushd dist
diff --git a/contrib/build-wine/deterministic.spec b/contrib/build-wine/deterministic.spec
index 52066eb19..1ac9eaaa0 100644
--- a/contrib/build-wine/deterministic.spec
+++ b/contrib/build-wine/deterministic.spec
@@ -2,12 +2,10 @@
 
 from PyInstaller.utils.hooks import collect_data_files, collect_submodules, collect_dynamic_libs
 
-import sys
-for i, x in enumerate(sys.argv):
-    if x == '--name':
-        cmdline_name = sys.argv[i+1]
-        break
-else:
+import sys, os
+
+cmdline_name = os.environ.get("ELECTRUM_CMDLINE_NAME")
+if not cmdline_name:
     raise Exception('no name')
 
 home = 'C:\\electrum\\'
diff --git a/contrib/osx/make_osx b/contrib/osx/make_osx
index 735995df9..afe115f53 100755
--- a/contrib/osx/make_osx
+++ b/contrib/osx/make_osx
@@ -217,7 +217,7 @@ find . -exec touch -t '200101220000' {} + || true
 VERSION=`git describe --tags --dirty --always`
 
 info "Building binary"
-pyinstaller --noconfirm --ascii --clean --name $VERSION contrib/osx/osx.spec || fail "Could not build binary"
+ELECTRUM_VERSION=$VERSION pyinstaller --noconfirm --ascii --clean contrib/osx/osx.spec || fail "Could not build binary"
 
 DoCodeSignMaybe "app bundle" "dist/${PACKAGE}.app"
 
diff --git a/contrib/osx/osx.spec b/contrib/osx/osx.spec
index 624da6297..db1d976b5 100644
--- a/contrib/osx/osx.spec
+++ b/contrib/osx/osx.spec
@@ -10,11 +10,8 @@ MAIN_SCRIPT='run_electrum'
 ICONS_FILE=PYPKG + '/gui/icons/electrum.icns'
 
 
-for i, x in enumerate(sys.argv):
-    if x == '--name':
-        VERSION = sys.argv[i+1]
-        break
-else:
+VERSION = os.environ.get("ELECTRUM_VERSION")
+if not VERSION:
     raise Exception('no version')
 
 electrum = os.path.abspath(".") + "/"