diff --git a/Sources/TSCBasic/Process/ProcessEnv.swift b/Sources/TSCBasic/Process/ProcessEnv.swift
index cc6eda5a..36debcfb 100644
--- a/Sources/TSCBasic/Process/ProcessEnv.swift
+++ b/Sources/TSCBasic/Process/ProcessEnv.swift
@@ -68,8 +68,6 @@ extension ProcessEnvironmentBlock {
   }
 }
 
-extension ProcessEnvironmentBlock: Sendable {}
-
 /// Provides functionality related a process's environment.
 public enum ProcessEnv {