diff --git a/Sources/CommandLineToolSupport/Intramodular/AnyCommandLineTool.swift b/Sources/CommandLineToolSupport/Intramodular/AnyCommandLineTool.swift
index 6a6c12a..fc1fcdf 100644
--- a/Sources/CommandLineToolSupport/Intramodular/AnyCommandLineTool.swift
+++ b/Sources/CommandLineToolSupport/Intramodular/AnyCommandLineTool.swift
@@ -30,3 +30,17 @@ open class AnyCommandLineTool {
         return result
     }
 }
+
+extension AnyCommandLineTool {
+    public func withUnsafeSystemShell<R>(
+        sink: Process.StandardOutputSink,
+        perform operation: (SystemShell) async throws -> R
+    ) async throws -> R {
+        try await withUnsafeSystemShell { shell in
+            shell.options ??= []
+            shell.options?.append(._forwardStdoutStderr(to: sink))
+            
+            return try await operation(shell)
+        }
+    }
+}
diff --git a/Sources/Merge/Intramodular/Process/Process.StandardOutputSink.swift b/Sources/Merge/Intramodular/Process/Process.StandardOutputSink.swift
index e7674a6..3066fa3 100644
--- a/Sources/Merge/Intramodular/Process/Process.StandardOutputSink.swift
+++ b/Sources/Merge/Intramodular/Process/Process.StandardOutputSink.swift
@@ -8,7 +8,7 @@ import System
 
 #if os(macOS)
 extension Process {
-    public enum StandardOutputSink {
+    public enum StandardOutputSink: Hashable {
         /// Redirect output to the terminal.
         case terminal
         /// Redirect output to the file at the given path, creating if necessary.
diff --git a/Sources/Merge/Intramodular/Process/_AsyncProcess.swift b/Sources/Merge/Intramodular/Process/_AsyncProcess.swift
index 377e7e9..8d8ac22 100644
--- a/Sources/Merge/Intramodular/Process/_AsyncProcess.swift
+++ b/Sources/Merge/Intramodular/Process/_AsyncProcess.swift
@@ -489,33 +489,39 @@ extension _AsyncProcess {
         }
     }
     
-    private func __handleData(_ data: Data, forPipe pipe: Pipe) async throws {
+    private func __handleData(
+        _ data: Data,
+        forPipe pipe: Pipe
+    ) async throws {
         guard !data.isEmpty else {
             return
         }
         
         let pipeName: Process.PipeName = try self.name(of: pipe)
-        
-        let forwardStdoutStderr: Bool = options.contains(._forwardStdoutStderr)
-        
+                
         switch pipeName {
             case .standardOutput:
                 _publishers.standardOutputPublisher.send(data)
-                
-                if forwardStdoutStderr {
-                    FileHandle.standardOutput.write(data)
-                }
             case .standardError:
                 _publishers.standardErrorPublisher.send(data)
-                
-                if forwardStdoutStderr {
-                    FileHandle.standardOutput.write(data)
-                }
             default:
                 break
         }
         
-        guard let dataAsString = String(data: data, encoding: String.Encoding.utf8), !dataAsString.isEmpty else {
+        let forwardStdoutStderrToTerminal: Bool = options.contains(where: { $0._stdoutStderrSink == .terminal }) // FIXME: (@vmanot) unhandled cases
+
+        if forwardStdoutStderrToTerminal {
+            switch pipeName {
+                case .standardOutput:
+                    FileHandle.standardOutput.write(data)
+                case .standardError:
+                    FileHandle.standardOutput.write(data)
+                default:
+                    break
+            }
+        }
+        
+        guard let dataAsString: String = String(data: data, encoding: String.Encoding.utf8), !dataAsString.isEmpty else {
             return
         }
         
@@ -717,7 +723,19 @@ extension _AsyncProcess {
     public enum Option: Hashable {
         case _useAppleScript
         case _useAuthorizationExecuteWithPrivileges
-        case _forwardStdoutStderr
+        case _forwardStdoutStderr(to: Process.StandardOutputSink)
+        
+        public static var _forwardStdoutStderr: Self {
+            ._forwardStdoutStderr(to: .terminal)
+        }
+        
+        public var _stdoutStderrSink: Process.StandardOutputSink {
+            guard case let ._forwardStdoutStderr(sink) = self else {
+                return .null
+            }
+
+            return sink
+        }
     }
 }
 
diff --git a/Sources/Merge/Intramodular/Shell Scripting/SystemShell.swift b/Sources/Merge/Intramodular/Shell Scripting/SystemShell.swift
index 5b17004..ca07f13 100644
--- a/Sources/Merge/Intramodular/Shell Scripting/SystemShell.swift	
+++ b/Sources/Merge/Intramodular/Shell Scripting/SystemShell.swift	
@@ -11,7 +11,7 @@ public final class SystemShell {
     public var environmentVariables: [String: String]
     public var currentDirectoryURL: URL?
     
-    public let options: [_AsyncProcess.Option]?
+    public var options: [_AsyncProcess.Option]?
     
     public init(
         environment: [String: String]? = nil,