diff --git a/src/kiss/Kiss.hx b/src/kiss/Kiss.hx
index 0718cd9..de4819d 100644
--- a/src/kiss/Kiss.hx
+++ b/src/kiss/Kiss.hx
@@ -78,6 +78,7 @@ class Kiss {
                 "assertProcess" => Symbol("Prelude.assertProcess"),
                 "random" => Symbol("Std.random"),
                 "walkDirectory" => Symbol("Prelude.walkDirectory"),
+                "purgeDirectory" => Symbol("Prelude.purgeDirectory"),
                 "getTarget" => Symbol("Prelude.getTarget"),
                 // These work with (apply) because they are added as "opAliases" in Macros.kiss:
                 "min" => Symbol("Prelude.min"),
diff --git a/src/kiss/Prelude.hx b/src/kiss/Prelude.hx
index f3bf654..972c8d6 100644
--- a/src/kiss/Prelude.hx
+++ b/src/kiss/Prelude.hx
@@ -409,11 +409,13 @@ class Prelude {
             switch (fileOrFolder) {
                 case folder if (FileSystem.isDirectory(joinPath(basePath, directory, folder))):
                     var subdirectory = joinPath(directory, folder);
-                    if (processFolderBefore != null)
+                    if (processFolderBefore != null) {
                         processFolderBefore(subdirectory);
+                    }
                     walkDirectory(basePath, subdirectory, processFile, processFolderBefore, processFolderAfter);
-                    if (processFolderAfter != null)
+                    if (processFolderAfter != null) {
                         processFolderAfter(subdirectory);
+                    }
                 case file:
                     processFile(joinPath(directory, file));
             }
@@ -423,6 +425,15 @@ class Prelude {
         #end
     }
 
+    public static function purgeDirectory(directory) {
+        #if (sys || hxnodejs)
+        walkDirectory("", directory, FileSystem.deleteFile, null, FileSystem.deleteDirectory);
+        FileSystem.deleteDirectory(directory);
+        #else
+        throw "Can't delete files/folders on this target.";
+        #end
+    }
+
     /**
      * On Sys targets and nodejs, Kiss can be converted to hscript at runtime
      * NOTE on non-nodejs targets, after the first time calling this function,