nvimpager: fix cross compilation

overlays/cross.nix

@@ -650,6 +650,17 @@ in with final; {
   #   # buildInputs = lib.remove gnupg upstream.buildInputs;
   # });
 
+  # 2025/02/10: upstreaming is blocked on ruby
+  nvimpager = prev.nvimpager.overrideAttrs (upstream: {
+    # fix so nvimpager specifies host machine sh as interpreter, not build sh
+    buildInputs = upstream.buildInputs ++ [
+      bash
+    ];
+    postFixup = (upstream.postFixup or "") + ''
+      patchShebangs --update --host $out/bin/nvimpager
+    '';
+  });
+
   # 2025/01/25: upstreaming is unblocked
   papers = prev.papers.override {
     cargo = crossCargo;