diff --git a/script/postinstall.cmd b/script/postinstall.cmd
index 6f679554b..f3608d84b 100644
--- a/script/postinstall.cmd
+++ b/script/postinstall.cmd
@@ -10,6 +10,11 @@ for /f "delims=" %%i in ('.\bin\node.exe -p "process.version + ' ' + process.arc
 echo ^>^> Rebuilding apm dependencies with bundled Node !bundledVersion!
 call .\bin\npm.cmd rebuild
 
-echo.
-echo ^>^> Deduping apm dependencies
-call .\bin\npm.cmd dedupe
+if defined NO_APM_DEDUPE (
+    echo.
+    echo ^>^> Deduplication disabled
+) else (
+    echo.
+    echo ^>^> Deduping apm dependencies
+    call .\bin\npm.cmd dedupe
+)
\ No newline at end of file