diff --git a/Setup/Cosmos.iss b/Setup/Cosmos.iss
index 8ff38d8ae..758cd40f3 100644
--- a/Setup/Cosmos.iss
+++ b/Setup/Cosmos.iss
@@ -145,7 +145,7 @@ UseRelativePaths=True
 
 [Run]
 Filename: "{app}\Build\Tools\nuget.exe"; Parameters: "sources Remove -Name ""Cosmos Local Package Feed"""; WorkingDir: "{app}"; Description: "Uninstall Kernel Packages"; StatusMsg: "Uninstalling Kernel Packages"
-Filename: "{app}\Build\Tools\nuget.exe"; Parameters: "sources Add -Name ""Cosmos Local Package Feed"" -Source ""{app}\packages\"""; WorkingDir: "{app}"; Description: "Install Kernel Packages"; StatusMsg: "Installing Kernel Packages"
+Filename: "{app}\Build\Tools\nuget.exe"; Parameters: "sources Add -Name ""Cosmos Local Package Feed"" -Source ""{app}\packages\\"""; WorkingDir: "{app}"; Description: "Install Kernel Packages"; StatusMsg: "Installing Kernel Packages"
 
 Filename: "{app}\Build\Tools\VSIXBootstrapper.exe"; Parameters: "/q /u:Cosmos.VS.ProjectSystem"; Description: "Remove Cosmos Project System"; StatusMsg: "Removing Visual Studio Extension: Cosmos Project System"
 Filename: "{app}\Build\Tools\VSIXBootstrapper.exe"; Parameters: "/q /u:Cosmos.VS.DebugEngine"; Description: "Remove Cosmos Debug Engine"; StatusMsg: "Removing Visual Studio Extension: Cosmos Debug Engine"