diff --git a/pkgs/by-name/signal-desktop-from-src/package.nix b/pkgs/by-name/signal-desktop-from-src/package.nix
index 62e5a755f..6d09ae42c 100644
--- a/pkgs/by-name/signal-desktop-from-src/package.nix
+++ b/pkgs/by-name/signal-desktop-from-src/package.nix
@@ -188,12 +188,13 @@ stdenv.mkDerivation (finalAttrs: {
     repo = "Signal-Desktop";
     leaveDotGit = true;  # signal calculates the release date via `git`
     rev = "v${finalAttrs.version}";
-    hash = "sha256-5zo8FYyO4l48IFxL5CfkCN5i9+DDfsJMElwf1+hh7ws=";
+    # XXX: hash is unstable because of the git pack dir
+    hash = "sha256-l32yJ/gXlHq8//lND5+rSMs1LGqKNa/5rGWRnIosHW8=";
   };
 
   pnpmDeps = pnpm_10.fetchDeps {
     inherit (finalAttrs) pname version src patches;
-    hash = "sha256-UZ1oM/6HP4IJgSPasSxE9TmXyp5S79HhJRZee4iRbWY=";
+    hash = "sha256-9aDnObCsQBadcELjDXGPelEuSiP7mj0B8WuteINP/TM=";
   };
 
   patches = [