Update coverage report path

Author: dmjio

haskell-miso.org/nix/nginx.nix

@@ -41,7 +41,7 @@ with (import ../../default.nix {});
           enableACME = true;
           locations = {
           "/" = {
-            root = pkgs.coverage;
+            root = "${pkgs.coverage}/coverage";
            };
          };
        };

nix/overlay.nix

@@ -30,8 +30,8 @@ options: self: super: {
     name = "coverage";
     src = ../coverage;
     buildCommand = ''
-      mkdir -p $out
-      cp -rv $src $out
+      mkdir -p $out/report
+      cp -rv $src $out/report
     '';
   };