diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index 0b026ae75f4..f8e6a730e25 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -92,7 +92,7 @@ let
           rm "$out/lib/"*.a
       fi
 
-    '' +
+    '' + stdenv.lib.optionalString (!stdenv.targetPlatform.isWindows)
     ''
       mkdir -p $bin
       substituteInPlace $out/bin/c_rehash --replace ${buildPackages.perl} ${perl}