--- a/driver/xscreensaver.c
+++ b/driver/xscreensaver.c
@@ -253,6 +253,8 @@
 #undef MAX
 #define MAX(x,y)((x)>(y)?(x):(y))
 
+/* Define the default wrapper prefix here, for NixOS */
+#define NIXOS_WRAPPER_PREFIX "@wrapperPrefix@"
 
 /* Globals used in this file.
  */
@@ -632,12 +634,24 @@ handle_sigchld (Display *dpy, Bool blanked_p)
 static void
 hack_environment (void)
 {
+  static const char *wrapper_path = NIXOS_WRAPPER_PREFIX;
   static const char *def_path = DEFAULT_PATH_PREFIX;
   const char *opath = getenv("PATH");
   char *npath;
   if (! opath) opath = "/bin:/usr/bin";  /* WTF */
-  npath = (char *) malloc(strlen(def_path) + strlen(opath) + 20);
+  /* NOTE: The NixOS patch adds extra margin than what would be expected for a
+     single extra ":" PATH separator to account for UTF-32 encoding. The
+     original 20 bytes would have only accounted for UTF-16 safely (the path
+     concatenation would have needed 28 bytes of margin at minimum for UTF-32).
+   */
+  npath = (char *) malloc(strlen(wrapper_path) + strlen(def_path) + strlen(opath) + 32);
   strcpy (npath, "PATH=");
+  if (wrapper_path && *wrapper_path)
+    {
+      strcat (npath, wrapper_path);
+      strcat (npath, ":");
+    }
+
   strcat (npath, def_path);
   strcat (npath, ":");
   strcat (npath, opath);