handle multiple package versions in registry.json

flake-module.nix

@@ -81,19 +81,6 @@ in
   
                   mkdir -p $OUT_PATH
                   tar -xzf $src -C $OUT_PATH --strip-components=1
-  
-                  SUBSET_FILTER='to_entries | map(select(.key == "version" or .key == "bin" or .key == "dependencies" or .key == "peerDependencies")) | from_entries'
-                  PACKAGE_SUBSET=$(${pkgs.jq}/bin/jq "$SUBSET_FILTER" $OUT_PATH/package.json)
-  
-                  cat > $OUT_PATH/../registry.json <<EOF
-                  {
-                    "name": "${name}",
-                    "dist-tags": {},
-                    "versions": {
-                      "${version}": $PACKAGE_SUBSET
-                    }
-                  }
-                  EOF
 
                   runHook postInstall
                 '';
@@ -109,11 +96,42 @@ in
               inherit pkgs lockfile registryHostname; 
             })
             lockfiles;
-        in
-          pkgs.symlinkJoin {
-            name = "deno-shared-cache";
+
+          baseCache = pkgs.symlinkJoin {
+            name = "deno-shared-cache-base";
             paths = allNpmDeps;
           };
+        in
+          pkgs.runCommand "deno-shared-cache" {} ''
+            cp -r ${baseCache} $out
+            chmod -R +w $out
+
+            # Generate registry.json for each package
+            find $out/npm/${registryHostname} -mindepth 1 -maxdepth 1 -type d | while read -r pkg_dir; do
+              pkg_name=$(basename "$pkg_dir")
+
+              # Collect all package.json files for this package
+              versions_json=$(
+                find "$pkg_dir" -mindepth 2 -maxdepth 2 -name package.json -type f \
+                | ${pkgs.jq}/bin/jq -n 'reduce inputs as $pkg ({}; 
+                    . + {
+                      ($pkg.version): ($pkg | {
+                        version: .version,
+                        bin: .bin,
+                        dependencies: .dependencies,
+                        peerDependencies: .peerDependencies
+                      } | with_entries(select(.value != null)))
+                    }
+                  )'
+              )
+
+              ${pkgs.jq}/bin/jq -n \
+                --arg name "$pkg_name" \
+                --argjson versions "$versions_json" \
+                '{name: $name, "dist-tags": {}, versions: $versions}' \
+                > "$pkg_dir/registry.json"
+            done
+          '';
 
       denoWithCache = { pkgs, baseDeno, sharedCache }:
         pkgs.writeShellScriptBin "deno" ''