diff --git a/dist/index.js b/dist/index.js
index ce3c07f..9f10f01 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -337,7 +337,7 @@ class DotnetCoreInstaller {
                 // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
                 scriptPath =
                     (yield io.which('pwsh', false)) || (yield io.which('powershell', true));
-                scriptArguments = [...windowsDefaultOptions, scriptArguments.join(' ')];
+                scriptArguments = windowsDefaultOptions.concat(scriptArguments);
             }
             else {
                 fs_1.chmodSync(escapedScript, '777');
diff --git a/src/installer.ts b/src/installer.ts
index 6f5a8b1..589fe39 100644
--- a/src/installer.ts
+++ b/src/installer.ts
@@ -214,7 +214,7 @@ export class DotnetCoreInstaller {
       // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
       scriptPath =
         (await io.which('pwsh', false)) || (await io.which('powershell', true));
-      scriptArguments = [...windowsDefaultOptions, scriptArguments.join(' ')];
+      scriptArguments = windowsDefaultOptions.concat(scriptArguments);
     } else {
       chmodSync(escapedScript, '777');
       scriptPath = await io.which(escapedScript, true);