I'm a bit unsure why this fails.

When I run nix-shell -p nixpkgs-review --run "nixpkgs-review wip I get this error:

error: patch failed: pkgs/development/libraries/libhdhomerun/default.nix:1 error: pkgs/development/libraries/libhdhomerun/default.nix: patch does not apply Failed to apply diff in /home/louis/.cache/nixpkgs-review/rev-c2e6ac97a41835d77084b7623b49ec181884c26b-dirty-10/nixpkgs

Commenting the patchPhase and 3 preceding lines does not help.

Running "nix-shell -p nixpkgs-review --show-trace --run "nixpkgs-review pr 93671" works. Installing package locally on my NixOS works.

@titanous Can you check if this package will build on Darwin? It seems like it wants to build with i386 flags which shouldn't be supported on 10.15+.

I don't have a Darwin machine easily available at the moment, someone else will have to test.

@rycee This package build for me on NixOS but I'm unsure about Darwin (macOS). Should I make it a Linux-only package or what would you suggest?

I'd suggest asking in #nixos @ freenode if there is any Darwin user that could help out by building the package. Basically it should be sufficient to run

$ nix run nixpkgs.nix-review --command nix-review pr 93671

in a Nixpkgs checkout

Darwin user is here.
Result of nixpkgs-review pr 93671 1

Darwin user is here.
Result of nixpkgs-review pr 93671 1
1 package marked as broken and skipped:

• kodiPlugins.pvr-hdhomerun
  1 package built:
• libhdhomerun

Thanks. Does kodiPlugins.pvr-hdhomerun have to be fixed for this package to get merged?

Since Kodi seems to be limited to Linux I can't imagine it being critical that its plugins build on Darwin. Squashed and rebased to master in 526c859.