diff --git a/packages/electron-builder/templates/nsis/portable.nsi b/packages/electron-builder/templates/nsis/portable.nsi
index f16b0b49bbc..bd90e6350ef 100644
--- a/packages/electron-builder/templates/nsis/portable.nsi
+++ b/packages/electron-builder/templates/nsis/portable.nsi
@@ -16,6 +16,7 @@ Section
 
 	!insertmacro extractEmbeddedAppPackage
 
+  System::Call 'Kernel32::SetEnvironmentVariable(t, t)i ("PORTABLE_EXECUTABLE_DIR", "$EXEDIR").r0'
 	ExecWait "$INSTDIR\${APP_EXECUTABLE_FILENAME}"
 
   SetOutPath $PLUGINSDIR
diff --git a/test/fixtures/test-app-one/index.html b/test/fixtures/test-app-one/index.html
index a50eff39f33..5143948678a 100644
--- a/test/fixtures/test-app-one/index.html
+++ b/test/fixtures/test-app-one/index.html
@@ -16,7 +16,7 @@ <h1>Hello World!</h1>
     Chrome <script>document.write(process.versions.chrome)</script>,
     and Electron <script>document.write(process.versions.electron)</script>.
 
-    and Electron <script>document.write(process.versions.electron)</script>.
+    Env: <script>document.write(JSON.stringify(process.env, null, 2))</script>.
 
     <button onclick="saveAppData()">Save app data</button>
   </body>