fill out murex a bit, cosmic fixes

flakes/murex-module-jump/flake.nix

@@ -0,0 +1,23 @@
+{
+  description = "Murex Jump module";
+
+  inputs = {
+    src = {
+      flake = false;
+      url = "github:lmorg/murex-module-jump";
+    };
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    src,
+    ...
+  }: {
+    overlays.murex-jump = final: _prev: {
+      murex-jump = final.callPackage ./default.nix {
+        inherit src;
+      };
+    };
+  };
+}