diff --git a/pkgs/development/libraries/libmspack/default.nix b/pkgs/development/libraries/libmspack/default.nix
index a26f0c3f3a48..d03cdd635cd1 100644
--- a/pkgs/development/libraries/libmspack/default.nix
+++ b/pkgs/development/libraries/libmspack/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "libmspack";
-  version = "0.10.1alpha";
+  version = "0.11alpha";
 
   src = fetchurl {
     url = "https://www.cabextract.org.uk/libmspack/${pname}-${version}.tar.gz";
-    sha256 = "13janaqsvm7aqc4agjgd4819pbgqv50j88bh5kci1z70wvg65j5s";
+    hash = "sha256-cN0fsvCuzDZ5G3Gh4YQOYhcweeraoIEZLRwyOg7uohs=";
   };
 
   meta = {