Refactor flake patching/recursion

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

packages/shlink-web-client/default.nix

@@ -1,13 +1,13 @@
 { pkgs, ... }:
 # AUTO-UPDATE: nix-update --flake shlink-web-client
-pkgs.buildNpmPackage rec {
+pkgs.buildNpmPackage (finalAttrs: {
   pname = "shlink-web-client";
   version = "4.4.1";
 
   src = pkgs.fetchFromGitHub {
     owner = "shlinkio";
-    repo = pname;
-    rev = "v${version}";
+    repo = finalAttrs.pname;
+    rev = "v${finalAttrs.version}";
     hash = "sha256-qq683pLqbQ6kMAzc9QOrUdGh67joCy401h3OOr270qQ=";
   };
 
@@ -19,11 +19,11 @@ pkgs.buildNpmPackage rec {
 
   postPatch = ''
     tmpfile=$(mktemp)
-    ${pkgs.lib.meta.getExe pkgs.jq} '.homepage = "${homepage}"' package.json > "$tmpfile"
+    ${pkgs.lib.meta.getExe pkgs.jq} '.homepage = "${finalAttrs.homepage}"' package.json > "$tmpfile"
     mv "$tmpfile" package.json
   '';
 
   installPhase = ''
     cp -r build $out
   '';
-}
+})