diff --git a/src/plugins/discovery.ts b/src/plugins/discovery.ts
index 47a09c85fef..3e7b7dd7cdc 100644
--- a/src/plugins/discovery.ts
+++ b/src/plugins/discovery.ts
@@ -504,19 +504,9 @@ function resolvePackageEntrySource(params: {
   const source = path.resolve(params.packageDir, params.entryPath);
   const rejectHardlinks = params.rejectHardlinks ?? true;
   const candidates = [source];
-  if (!rejectHardlinks) {
-    const builtCandidate = source.replace(/\.[^.]+$/u, ".js");
-    if (builtCandidate !== source) {
-      candidates.push(builtCandidate);
-    }
-  }
-
-  for (const candidate of new Set(candidates)) {
-    if (!fs.existsSync(candidate)) {
-      continue;
-    }
+  const openCandidate = (absolutePath: string): string | null => {
     const opened = openBoundaryFileSync({
-      absolutePath: candidate,
+      absolutePath,
       rootPath: params.packageDir,
       boundaryLabel: "plugin package directory",
       rejectHardlinks,
@@ -545,38 +535,22 @@ function resolvePackageEntrySource(params: {
     const safeSource = opened.path;
     fs.closeSync(opened.fd);
     return safeSource;
+  };
+  if (!rejectHardlinks) {
+    const builtCandidate = source.replace(/\.[^.]+$/u, ".js");
+    if (builtCandidate !== source) {
+      candidates.push(builtCandidate);
+    }
   }
 
-  const opened = openBoundaryFileSync({
-    absolutePath: source,
-    rootPath: params.packageDir,
-    boundaryLabel: "plugin package directory",
-    rejectHardlinks,
-  });
-  if (!opened.ok) {
-    return matchBoundaryFileOpenFailure(opened, {
-      path: () => null,
-      io: () => {
-        params.diagnostics.push({
-          level: "warn",
-          message: `extension entry unreadable (I/O error): ${params.entryPath}`,
-          source: params.sourceLabel,
-        });
-        return null;
-      },
-      fallback: () => {
-        params.diagnostics.push({
-          level: "error",
-          message: `extension entry escapes package directory: ${params.entryPath}`,
-          source: params.sourceLabel,
-        });
-        return null;
-      },
-    });
+  for (const candidate of new Set(candidates)) {
+    if (!fs.existsSync(candidate)) {
+      continue;
+    }
+    return openCandidate(candidate);
   }
-  const safeSource = opened.path;
-  fs.closeSync(opened.fd);
-  return safeSource;
+
+  return openCandidate(source);
 }
 
 function discoverInDirectory(params: {