diff --git a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
new file mode 100644
index 00000000000..4347f07d9c2
--- /dev/null
+++ b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
@@ -0,0 +1,20 @@
+{ stdenv, buildPythonPackage, fetchPypi, six, attrs, twisted, pyopenssl, service-identity, autobahn, treq, mock }:
+
+buildPythonPackage rec {
+  version = "0.3.1";
+  pname = "magic-wormhole-mailbox-server";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1q6zhbx8fcpk7rchclm7yqcxdsc1x97hki2ji61sa544r5xvxv55";
+  };
+
+  propagatedBuildInputs = [ six attrs twisted pyopenssl service-identity autobahn ];
+  checkInputs = [ treq mock ];
+
+  meta = with stdenv.lib; {
+    description = "Securely transfer data between computers";
+    homepage = https://github.com/warner/magic-wormhole-mailbox-server;
+    license = licenses.mit;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 20895690169..9dc05aec4be 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3916,6 +3916,8 @@ in {
 
   magic-wormhole = callPackage ../development/python-modules/magic-wormhole { };
 
+  magic-wormhole-mailbox-server = callPackage ../development/python-modules/magic-wormhole-mailbox-server { };
+
   magic-wormhole-transit-relay = callPackage ../development/python-modules/magic-wormhole-transit-relay { };
 
   wxPython = self.wxPython30;