diff --git a/nix/tahoe-chk.nix b/nix/tahoe-chk.nix
index d903eedd3914c0ed7da8c3ada0b8454eb4ad0b84..4c79be6ff343a138c42cd367fdaf5ddcf5de3868 100644
--- a/nix/tahoe-chk.nix
+++ b/nix/tahoe-chk.nix
@@ -45,8 +45,8 @@ mkDerivation {
   version = "0.1.0.0";
   src = fetchgit {
     url = "https://whetstone.private.storage/PrivateStorage/tahoe-chk.git";
-    sha256 = "1gbrf2j8zmy1772rxywi5ld8y7rnfqccxwr1igbbwxaj5lbphcsq";
-    rev = "1de296b50c4269d95097d924fac34f0725e8fa9e";
+    sha256 = "sha256-gtlHidh8+qMUdnTzlxLIGlCMavq4/TFQDmope33Cd2w=";
+    rev = "799bab0c2b8b5f9cbd98e7dd7d6a77285c87f16b";
     fetchSubmodules = true;
   };
   isLibrary = true;