diff --git a/pkgs/by-name/nixpkgs-bootstrap/patches.nix b/pkgs/by-name/nixpkgs-bootstrap/patches.nix
index f493ccd8b..0c973adb8 100644
--- a/pkgs/by-name/nixpkgs-bootstrap/patches.nix
+++ b/pkgs/by-name/nixpkgs-bootstrap/patches.nix
@@ -47,10 +47,11 @@ in
   })
 
   (fetchpatch' {
-    # TODO: send upstream
     name = "libbytesize: fix cross compilation";
+    prUrl = "https://github.com/NixOS/nixpkgs/pull/354886";
     saneCommit = "8e0888faacd11e7e550c86b4ad5355b71a276cf6";
-    hash = "sha256-xeZsZ+uGL6fhHpFDOTI/hdPP/JTSzL99vwlvYvGyW2M=";
+    # hash = "sha256-xeZsZ+uGL6fhHpFDOTI/hdPP/JTSzL99vwlvYvGyW2M=";
+    hash = "sha256-Y3LS6JUZOOO8Sol3dffn7ONe6mo1POA5gQp1f6mZRBs=";
   })
 
   (fetchpatch' {