diff --git a/pkgs/python-packages/default.nix b/pkgs/python-packages/default.nix
index de08158..c7162f3 100644
--- a/pkgs/python-packages/default.nix
+++ b/pkgs/python-packages/default.nix
@@ -11,6 +11,7 @@ in {
   urldecode = callPackage ./urldecode {};
   chromalog = callPackage ./chromalog {};
   txzmq = callPackage ./txzmq {};
+  sha256 = callPackage ./sha256 {};
   runes = callPackage ./runes {};
 
   joinmarketbase = joinmarketPkg ./jmbase;
diff --git a/pkgs/python-packages/sha256/default.nix b/pkgs/python-packages/sha256/default.nix
new file mode 100644
index 0000000..50fd0c7
--- /dev/null
+++ b/pkgs/python-packages/sha256/default.nix
@@ -0,0 +1,32 @@
+{ lib, buildPythonPackage, fetchFromGitHub, cython }:
+
+buildPythonPackage rec {
+  pname = "sha256";
+  version = builtins.substring 0 8 src.rev;
+
+  # The version from pypi is old/broken
+  src = fetchFromGitHub {
+    repo = "sha256";
+    owner = "cloudtools";
+    rev = "e0645d118f7296dde45397a755261f78d421bdee";
+    sha256 = "sha256-gEctMgF5qZiWelVHVCl3zazRNuaQ7lJP8ExI5xWEBVI=";
+  };
+
+  nativeBuildInputs = [ cython ];
+
+  doCheck = false;
+
+  configurePhase = ''
+    python setup.py sdist
+  '';
+
+  meta = with lib; {
+    description = ''
+      SHA-256 implementation that allows for setting and getting the mid-state
+      information.
+    '';
+    homepage = "https://github.com/cloudtools/sha256";
+    maintainers = with maintainers; [ jb55 ];
+    license = licenses.mit;
+  };
+}