Fix a compilation error (#2119)

Sources/ContainerBuild/Builder.swift

@@ -108,7 +108,7 @@ public struct Builder: Sendable {
         }
 
         if let terminal = config.terminal {
-            Task {
+            _ = Task {
                 let winchHandler = AsyncSignalHandler.create(notify: [SIGWINCH])
                 let setWinch = { (rows: UInt16, cols: UInt16) in
                     var winch = ClientStream()

Sources/Plugins/NetworkVmnet/NetworkVmnetHelper+Start.swift

@@ -26,6 +26,7 @@ import ContainerizationError
 import ContainerizationExtras
 import Foundation
 import Logging
+import SystemPackage
 
 enum Variant: String, ExpressibleByArgument {
     case reserved

Sources/Plugins/RuntimeLinux/RuntimeLinuxHelper+Start.swift

@@ -24,6 +24,7 @@ import ContainerXPC
 import Foundation
 import Logging
 import NIO
+import SystemPackage
 
 extension RuntimeLinuxHelper {
     struct Start: AsyncParsableCommand {