diff --git a/nightly.nix b/nightly.nix
index 184271c..ae222d3 100644
--- a/nightly.nix
+++ b/nightly.nix
@@ -2,7 +2,7 @@
 # Auto-updated by scripts/update-nightly.sh — do not edit manually.
 { pkgs }:
 pkgs.callPackage ./package.nix {
-  pinVersion = "0.19.0-unstable-2026-07-22.9eb7b1a6";
-  pinRev = "9eb7b1a6b1ffdd4ad1a85aee3f38edceee2b927f";
-  pinHash = "sha256-baXMhFvdjbw6nW0TChPWlBZrCRxFCnyLJ1Pe7IjGDUA=";
+  pinVersion = "0.20.0-unstable-2026-08-11.a31be480";
+  pinRev = "a31be48030f60383bf4c1d96ba46bd4b48430218";
+  pinHash = "sha256-HTd8Mfr9xR3QRH/NFcUIXGVzi7el5AJISNKj8TxDTWg=";
 }