diff --git a/Sources/MMIOUtilities/ShellCommand.swift b/Sources/MMIOUtilities/ShellCommand.swift
index 5739d1f0..bd5b3018 100644
--- a/Sources/MMIOUtilities/ShellCommand.swift
+++ b/Sources/MMIOUtilities/ShellCommand.swift
@@ -9,6 +9,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if !os(WASI)
+
 import Dispatch
 import Foundation
 
@@ -104,3 +106,5 @@ public func sh(
 
   return outputData.withLock { $0 }.asUTF8String()
 }
+
+#endif