diff --git a/plugin/src/App/Components/Studio/StudioPluginGui.lua b/plugin/src/App/Components/Studio/StudioPluginGui.lua
index 6b9910a9..236c9300 100644
--- a/plugin/src/App/Components/Studio/StudioPluginGui.lua
+++ b/plugin/src/App/Components/Studio/StudioPluginGui.lua
@@ -1,3 +1,5 @@
+local HttpService = game:GetService("HttpService")
+
 local Rojo = script:FindFirstAncestor("Rojo")
 local Plugin = Rojo.Plugin
 local Packages = Rojo.Packages
@@ -36,7 +38,7 @@ function StudioPluginGui:init()
 		minimumSize.Y
 	)
 
-	local pluginGui = self.props.plugin:CreateDockWidgetPluginGui(self.props.id, dockWidgetPluginGuiInfo)
+	local pluginGui = self.props.plugin:CreateDockWidgetPluginGui(if self.props.isEphemeral then HttpService:GenerateGUID(false) else self.props.id, dockWidgetPluginGuiInfo)
 
 	pluginGui.Name = self.props.id
 	pluginGui.Title = self.props.title
diff --git a/plugin/src/App/StatusPages/Confirming.lua b/plugin/src/App/StatusPages/Confirming.lua
index 74c814a1..098c2dbd 100644
--- a/plugin/src/App/StatusPages/Confirming.lua
+++ b/plugin/src/App/StatusPages/Confirming.lua
@@ -140,6 +140,7 @@ function ConfirmingPage:render()
 				id = "Rojo_ConfirmingSourceDiff",
 				title = "Source diff",
 				active = self.state.showingSourceDiff,
+				isEphemeral = true,
 
 				initDockState = Enum.InitialDockState.Float,
 				overridePreviousState = true,
@@ -182,6 +183,7 @@ function ConfirmingPage:render()
 					self.props.confirmData.serverInfo.projectName or "UNKNOWN"
 				),
 				active = true,
+				isEphemeral = true,
 
 				initDockState = Enum.InitialDockState.Float,
 				overridePreviousState = false,
diff --git a/plugin/src/App/StatusPages/Connected.lua b/plugin/src/App/StatusPages/Connected.lua
index 27f4e7ca..b385b1c4 100644
--- a/plugin/src/App/StatusPages/Connected.lua
+++ b/plugin/src/App/StatusPages/Connected.lua
@@ -398,6 +398,7 @@ function ConnectedPage:render()
 				id = "Rojo_ConnectedSourceDiff",
 				title = "Source diff",
 				active = self.state.showingSourceDiff,
+				isEphemeral = true,
 
 				initDockState = Enum.InitialDockState.Float,
 				overridePreviousState = false,
diff --git a/plugin/src/App/init.lua b/plugin/src/App/init.lua
index e5635de4..8f3437f1 100644
--- a/plugin/src/App/init.lua
+++ b/plugin/src/App/init.lua
@@ -749,6 +749,7 @@ function App:render()
 					id = pluginName,
 					title = pluginName,
 					active = self.state.guiEnabled,
+					isEphemeral = false,
 
 					initDockState = Enum.InitialDockState.Right,
 					overridePreviousState = false,
diff --git a/src/cli/build.rs b/src/cli/build.rs
index 8f705d37..0593cc05 100644
--- a/src/cli/build.rs
+++ b/src/cli/build.rs
@@ -30,13 +30,13 @@ pub struct BuildCommand {
     /// Where to output the result.
     ///
     /// Should end in .rbxm, .rbxl, .rbxmx, or .rbxlx.
-    #[clap(long, short)]
+    #[clap(long, short, conflicts_with = "plugin")]
     pub output: Option<PathBuf>,
 
     /// Alternative to the output flag that outputs the result in the local plugins folder.
     ///
     /// Should end in .rbxm or .rbxl.
-    #[clap(long, short)]
+    #[clap(long, short, conflicts_with = "output")]
     pub plugin: Option<PathBuf>,
 
     /// Whether to automatically rebuild when any input files change.
@@ -47,14 +47,6 @@ pub struct BuildCommand {
 impl BuildCommand {
     pub fn run(self) -> anyhow::Result<()> {
         let (output_path, output_kind) = match (self.output, self.plugin) {
-            (Some(_), Some(_)) => {
-                BuildCommand::command()
-                    .error(
-                        clap::ErrorKind::ArgumentConflict,
-                        "the argument '--output <OUTPUT>' cannot be used with '--plugin <PLUGIN>'",
-                    )
-                    .exit();
-            }
             (None, None) => {
                 BuildCommand::command()
                     .error(
@@ -80,6 +72,7 @@ impl BuildCommand {
 
                 (studio.plugins_path().join(&plugin), output_kind)
             }
+            _ => unreachable!(),
         };
 
         let project_path = resolve_path(&self.project);