diff --git a/lib/spawn-posix.js b/lib/spawn-posix.js
index 84f6a03..604bfef 100644
--- a/lib/spawn-posix.js
+++ b/lib/spawn-posix.js
@@ -11,6 +11,7 @@
 //------------------------------------------------------------------------------
 
 const crossSpawn = require("cross-spawn")
+const getDescendentProcessInfo = require("pidtree")
 
 //------------------------------------------------------------------------------
 // Helpers
@@ -21,22 +22,22 @@ const crossSpawn = require("cross-spawn")
  * @this ChildProcess
  * @returns {void}
  */
-// function kill() {
-//     getDescendentProcessInfo(this.pid, (err, descendent) => {
-//         if (err) {
-//             return
-//         }
-
-//         for (const child of descendent) {
-//             try {
-//                 process.kill(child.PID)
-//             }
-//             catch (_err) {
-//                 // ignore.
-//             }
-//         }
-//     })
-// }
+function kill() {
+    getDescendentProcessInfo(this.pid, { root: true }, (err, pids) => {
+        if (err) {
+            return
+        }
+
+        for (const pid of pids) {
+            try {
+                process.kill(pid)
+            }
+            catch (_err) {
+                // ignore.
+            }
+        }
+    })
+}
 
 //------------------------------------------------------------------------------
 // Public Interface
@@ -57,7 +58,7 @@ const crossSpawn = require("cross-spawn")
  */
 module.exports = function spawn(command, args, options) {
     const child = crossSpawn(command, args, options)
-    // child.kill = kill
+    child.kill = kill
 
     return child
 }
diff --git a/package.json b/package.json
index f498522..2121f28 100644
--- a/package.json
+++ b/package.json
@@ -34,6 +34,7 @@
     "cross-spawn": "^6.0.5",
     "memorystream": "^0.3.1",
     "minimatch": "^3.0.4",
+    "pidtree": "^0.3.0",
     "read-pkg": "^3.0.0",
     "shell-quote": "^1.6.1",
     "string.prototype.padend": "^3.0.0"